Nucleo-G474RE Pinout, Datasheet, Schematic [Ultimate Guide]

In this guide, you’ll find the Nucleo-G474RE pinout diagram, its datasheet and schematic diagram, and every pin group explained with its default pins and gotchas. Without further ado, let’s get right into it!

The Nucleo-G474RE is ST’s official Nucleo-64 board for the STM32G474RE, a 170MHz Arm Cortex-M4 with FPU, 512KB Flash and 128KB RAM, built for digital power and motor control. It packs a 184ps HRTIM, 3 advanced timers, 5 ADCs, 6 op-amps, 7 comparators, and 3 FDCAN ports, with an on-board STLINK-V3E debugger, so all you need is a USB cable.

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Nucleo-G474RE Pinout Diagram

Here is a detailed Nucleo-G474RE Pinout Diagram with colored labels and legends to help you easily identify the functionalities that each pin can perform. This first diagram covers the Arduino Uno V3 headers (CN5, CN6, CN8, and CN9), which is where most shields and jumper wires go.

Each row shows the header pin number, the Arduino name (D0–D15, A0–A5), the STM32 GPIO name and its alternate functions, color-coded by peripheral. The small dot marks a 5v-tolerant pin, the square marks a 3.3v-only pin (there are many on this board), and the numbered badges point to the notes at the bottom of the diagram.

Nucleo-G474RE Morpho CN7 Pinout

The left ST Morpho header CN7 is a 2×19 male header. Odd pins (1, 3, 5…37) are on the outer column and even pins are on the inner column, with pin 1 at the top, next to the STLINK-V3E part of the board.

Nucleo-G474RE Morpho CN10 Pinout

The right ST Morpho header CN10 is also 2×19, but here the odd pins are on the inner column. It carries most of the G474’s power-control signals: 10 of the 12 HRTIM outputs, the USB pins, two FDCAN pin pairs, and the op-amp and comparator pins on PB11–PB15.

Every Arduino header signal is also on the Morpho headers (for example, D13/PA5 is also CN10-11), so the Morpho headers are a superset. D0 (PC5) and D1 (PC4) even appear twice on CN10 (CN10-6/37 and CN10-34/35). The only GPIOs you won’t find on any header are PA2/PA3, which go to the STLINK-V3E Virtual COM port.

Buy a Nucleo-G474RE: If you don’t have one yet, you can get the official ST board from Amazon or AliExpress. It comes with the STLINK-V3E debugger on board, so you can start programming it right away.

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Nucleo-G474RE Datasheet

This development board is built around the STM32G474RET6 microcontroller (LQFP64 package). Here are the official Nucleo-G474RE datasheet and documents you’ll need for it, all linked to ST’s own servers so you always get the latest revision:

Document	ID	Revision	What you’ll use it for	Link
STM32G474xB/xC/xE datasheet	DS12288	Rev 6 (Nov 2021)	Pin definitions (FT/TT), alternate-function table, electrical limits	PDF
STM32G4 series reference manual	RM0440	Rev 9 (Mar 2025)	Registers and how every peripheral works (HRTIM, ADC, FDCAN…)	PDF
STM32G4 Nucleo-64 boards (MB1367) user manual	UM2505	Rev 7 (May 2026)	Board pinout tables, jumpers, solder bridges, power options	PDF
NUCLEO-G474RE data brief	DB2196	Rev 23 (Oct 2026)	One-page board summary and order code	PDF
STM32G474xx device errata	ES0430	Rev 10 (Nov 2026)	Known silicon limitations and workarounds	PDF
MB1367 G474RE board schematic	MB1367 D-01	Sep 2025	Full board circuit (see the next section)	PDF

Which document do I need? The datasheet for pin functions and electrical limits, the reference manual for registers, and the UM2505 user manual for jumpers, solder bridges, and the header map. Note that this board uses UM2505, not the UM1724 manual of the older Nucleo-64 boards like the Nucleo-F446RE. All of them are listed on the official NUCLEO-G474RE product page.

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Nucleo-G474RE Schematic

The Nucleo-G474RE schematic is ST’s MB1367 rev D-01 drawing, which is the G474RE version of the STM32G4 Nucleo-64 board (the same PCB is used by the NUCLEO-G431RB and NUCLEO-G491RE). Here are its 6 circuit sheets; click a page to view it full screen.

Official source: MB1367 G474RE D-01 schematic (PDF) from the NUCLEO-G474RE product page (CAD Resources). Here’s what to look at on each sheet:

• Main power (sheet 5): the STLINK-V3E USB 5v goes through a current-limited power switch (LD4 lights above 500mA). VIN (7v–12v) feeds the LD1117S50 5v regulator, and jumper JP5 picks the 5v source (STLINK, VIN, E5V or a USB charger). The 5v rail feeds the LD39050PU33R 3.3v regulator (U12, 500mA) that powers the MCU.
• MCU I/Os (sheet 2): the solder bridges that route the pins: SB17/SB23 put LPUART1 (PA2/PA3) on the Virtual COM port, SB13/SB19 put USART1 (PC4/PC5) on D1/D0, SB35/SB36 put PC1/PC0 on A4/A5, SB2/SB4 bring PB8 to D15 and CN7-7, and SB6 connects LD2 to PA5. The user button B1 is wired to VDD, so PC13 reads HIGH when pressed.
• Clocks (sheet 2): unlike the older Nucleo-64 boards, the G474RE has a real 24MHz HSE crystal (X3) on PF0/PF1 and a 32.768kHz LSE crystal (X2) on PC14/PC15. The STLINK-V3E MCO can feed the HSE instead (SB27, open by default).
• MCU power (sheet 3): VDDA goes through ferrite bead L1, and VREF+ through L2 to jumper JP8, which picks a TL1431 reference (3.25v, or 2.5v with SB14) or VDD. VBAT is tied to VDD by SB38.
• STLINK-V3E (sheet 6): an STM32F723 handles SWD debugging (PA13/PA14, PB3 SWO, NRST), drag-and-drop flashing and the Virtual COM port, through the USB Micro-B connector CN1. CN4 (STDC14/MIPI10) takes an external probe, and JP1 holds the STLINK-V3E in reset.
• Extension connectors (sheet 4): the Arduino (CN5/CN6/CN8/CN9) and Morpho (CN7/CN10) headers, with each solder-bridge option drawn next to the pin it changes.

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Nucleo-G474RE Specs

The Nucleo-G474RE combines a 170MHz STM32G474RET6 with ST’s STM32G4 Nucleo-64 board (MB1367). Here are its specifications, including the board-level parts that chip-only spec lists usually skip.

Get a Nucleo-G474RE: The official ST board is the one I recommend. Grab it from Amazon or AliExpress.

Item	Nucleo-G474RE
MCU	STM32G474RET6, LQFP64
Core	Arm Cortex-M4 with FPU and DSP, up to 170MHz (213 DMIPS), ART Accelerator, CORDIC and FMAC math accelerators
Memory	512KB Flash (dual bank, ECC), 128KB SRAM (including 32KB CCM SRAM)
Logic level	3.3v; 18 of the header GPIOs are 3.3v-only (TT), the rest are 5v tolerant (FT)
GPIO pins	49 on the Morpho headers (45 connected by default), 22 on the Arduino headers
Board supply	USB 5v (500mA), VIN 7v–12v, E5V 4.75v–5.25v, a USB charger, or 3.3v direct
5v regulator	LD1117S50: 800mA at 7v in, 450mA at 7v–9v, 250mA at 9v–12v
3.3v regulator	LD39050PU33R, 500mA
Clocks	24MHz HSE crystal (X3), 32.768kHz LSE crystal (X2)
Debugger	On-board STLINK-V3E: SWD, drag-and-drop flashing, Virtual COM port on LPUART1
USB connector	Micro-B (CN1), for the STLINK-V3E only
Headers	Arduino Uno V3 (CN5, CN6, CN8, CN9) + two 2×19 ST Morpho headers (CN7, CN10), STDC14/MIPI10 debug connector (CN4)
User I/O	LD2 green LED (PA5), B1 user button (PC13, active HIGH), B2 reset button
PCB	MB1367 (STM32G4 Nucleo-64), shared with the NUCLEO-G431RB and NUCLEO-G491RE

Nucleo-G474RE Specifications Summary

• The Nucleo-G474RE runs the STM32G474RET6 at up to 170MHz with 512KB Flash and 128KB RAM.
• It has a high-resolution timer (HRTIM) with 184ps resolution and 12 outputs, all 12 of them on the headers.
• It has 5x 12-bit ADCs (4Msps), 3 external DAC outputs, 6 op-amps and 7 comparators.
• 18 header GPIOs are 3.3v only, including A0–A4, D0, D6, D11, D12, and D13. The rest are 5v tolerant.
• The Virtual COM port is LPUART1 on PA2/PA3, and D0/D1 are USART1 (PC5/PC4).
• 21 Arduino pins can output PWM: every D pin except D1, plus A0–A5.
• The default I2C pins are D15 (PB8, SCL) and D14 (PB9, SDA); A4/A5 are not I2C by default.
• The default SPI pins are D13 (SCK), D12 (MISO), D11 (MOSI) on SPI1.
• It has 3x FDCAN (CAN FD) controllers; FDCAN1 is on D15/D14. A transceiver is needed.
• D15 (PB8) is also the BOOT0 pin.
• The user LED LD2 is on PA5 (D13), and the user button B1 on PC13 reads HIGH when pressed.
• VIN accepts 7v–12v, and the 3.3v regulator gives up to 500mA.

Nucleo-G474RE Peripherals: MCU vs On the Headers

The STM32G474RE has more peripherals than the Arduino headers can show. This table tells you what the chip has and where you can actually reach it on the board.

Peripheral	STM32G474RE (LQFP64)	On the Arduino headers	On the Morpho headers
ADC	5x 12-bit, 4Msps, 26 external channels	13 pins (A0–A5, D0, D1, D7, D8, D11–D13)	22 pins (PA2/PA3 go to the VCP, PF0/PF1 to the crystal)
DAC	7 channels (3 external outputs + 4 internal)	A2 (DAC1_OUT1), D13 (DAC1_OUT2), D12 (DAC2_OUT1)	same 3
Op-amps / comparators	6 op-amps (PGA), 7 comparators	some inputs and outputs	all pins
HRTIM	6 timer units, 12 outputs, 184ps	CHA1 (D7), CHA2 (D8), CHB1 (D2), CHF2 (D9)	all 12 outputs
Other timers	TIM1/8/20 (advanced), TIM2/5 (32-bit), TIM3/4/15/16/17, TIM6/7, LPTIM1	21 PWM pins	17 on CN7, 27 on CN10
U(S)ART	USART1/2/3, UART4/5, LPUART1	USART1 (D0/D1 default, D2/D8, D10), USART3, LPUART1	all six; LPUART1 PA2/PA3 is the VCP
SPI / I²S	SPI1, SPI2, SPI3 (SPI2/3 also I²S)	SPI1 (D11–D13), SPI3 (D3–D5)	SPI1–SPI3
I²C	I2C1–I2C4 (Fm+ on _f pins)	I2C1 (D14/D15), I2C2, I2C3, I2C4_SDA	all four
FDCAN	3x CAN FD	FDCAN1 (D14/D15), FDCAN2 (D4/D10), FDCAN3 (D7, D3/D5)	plus PA11/PA12, PB12/PB13, PA15
USB	USB 2.0 FS device + UCPD (Type-C PD)	UCPD CC1/CC2 on D10/D5	USB on PA11/PA12 (no USB socket for the MCU)
Others	Quad-SPI, SAI1, RNG, AES, CRC, CORDIC, FMAC, VREFBUF	some signals	yes

There’s no FSMC and no SPI4 on this 64-pin package; those exist only on the larger STM32G474 packages.

Nucleo-G474RE Quick Pin Selection Guide

Not sure which pin to use? Here are the Nucleo-G474RE pins I’d pick first for each job, and why.

Use case	Recommended pins	Why
Serial to the PC	LPUART1 (PA2/PA3) via USB	Already wired to the STLINK-V3E Virtual COM port; Serial in Arduino
Serial to a module (GPS, Bluetooth…)	USART1: D1 (TX), D0 (RX)	The Arduino UART pins, free and on USART1 by default
I2C sensors and displays	D15 (SCL), D14 (SDA)	The default Wire pins; add pull-ups
SPI devices	D13 (SCK), D12 (MISO), D11 (MOSI), D10 (CS)	The default SPI pins (SPI1)
Power converter PWM	HRTIM: D7/D8 (CHA1/CHA2), D2 (CHB1), PB12–PB15 (CHC/CHD)	184ps resolution, dead-time, fault inputs
Motor control (3-phase)	TIM1: D7, D8, D2 + PB13, PB14, PB15 (CH1N–CH3N)	Complementary outputs with dead-time and break input
Analog inputs	A0, A1, A3, A5 + D7, D8	Free ADC pins with no board load
Analog output (DAC)	A2 (PA4)	DAC1_OUT1 with no LED load (D13 drives LD2)
CAN FD bus	D15 (FDCAN1_RX), D14 (FDCAN1_TX)	With a CAN FD transceiver
USB device	PA11 (DM), PA12 (DP) on CN10	USB FS with the on-chip PHY
On-board LED / button	PA5 (LD2), PC13 (B1)	LED_BUILTIN and USER_BTN in Arduino
5v signals	Any FT pin: D1–D5, D7–D10, D14, D15, A5	The 5v-tolerant header pins
Safest general GPIO	D4, D7, D9, and the Morpho-only PC6, PC8–PC12, PD2	No board load, no debug, boot or UCPD role

Nucleo-G474RE Pins to Use With Caution

Pin	Reason	What to do
A0–A4, D0, D6, D11–D13 (and PB1, PB2, PB11–PB15, PC3)	TT pins: not 5v tolerant (max 3.6v)	Never connect 5v signals; use a level shifter or a divider
PA5 (D13)	Drives LED LD2 through a transistor (SB6)	Fine for SPI and PWM; open SB6 for a clean DAC output
PA2, PA3	LPUART1 to the STLINK-V3E Virtual COM port, not on any header	Use them for printf; use USART1 (D0/D1) for modules
PB8 (D15, CN7-7)	BOOT0 pin	Check the nSWBOOT0 option bit before using it as I/O at reset (see Boot Pins)
PB4 (D5), PB6 (D10)	UCPD dead-battery pull-downs (5.1kΩ) when PA9/PA10 are HIGH	Disable them with HAL_PWREx_DisableUCPDDeadBattery()
PA13, PA14	SWD pins of the STLINK-V3E	Don’t reuse them, or you lose debugging
PB3 (D3), PB4 (D5), PA15	JTAG pins (SWO, NJTRST, JTDI) after reset	Set debug to Serial Wire to free them; PB4 has a pull-up after reset
PC13, PC14, PC15	Backup-domain pins: 3mA sink max, 2MHz max, never a current source	Use PC13 for B1 only; PC14/PC15 are taken by X2
PF0, PF1	Taken by the 24MHz crystal X3	Not on CN7 unless you move SB24/SB28 and SB25/SB26
PC1, PC0 (A4, A5)	Not I2C by default	Use D15/D14 for I2C, or fit SB34/SB37

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Nucleo-G474RE Pins Functions

The 49 GPIO pins on the Nucleo-G474RE headers are divided into the following groups based on the hardware functionality they’re used for. Most pins have several alternate functions, so one pin can belong to more than one group.

• Power Pins: VIN, 5V, 3V3, IOREF, E5V, 5V_CHGR, VREFP, VBAT, GND
• 49x Digital GPIO Pins (22 on the Arduino headers)
• 16x External Interrupt Lines (any GPIO)
• 22x ADC Analog Input Pins (13 on the Arduino headers)
• 3x DAC Output Pins
• 6x Op-Amps & 7x Comparators
• 43x PWM Pins (21 on the Arduino headers)
• 12x HRTIM Outputs and advanced-timer pins
• 6x UART Ports
• 4x I2C Buses
• 3x SPI Ports
• 3x FDCAN Ports
• USB & USB-C PD (UCPD) Pins
• Debug (SWD) & Boot Pins

We’ll discuss each pin group in the following sections one by one in more detail.

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Nucleo-G474RE Power Pins

The Nucleo-G474RE can be powered from the USB connector (5v, 500mA), the VIN pin (7v–12v), the E5V pin (4.75v–5.25v), a USB charger, or directly from 3.3v. Jumper JP5 selects the 5v source. The power pins are highlighted in red in the pinout diagrams.

Pin	Header Pins	Range	Notes
VIN	CN6-8, CN7-24	7v–12v in	LD1117 5v regulator: 800mA at 7v, 450mA at 7v–9v, 250mA at 9v–12v. Set JP5 to 5V_VIN
E5V	CN7-6	4.75v–5.25v in	500mA max. Set JP5 to E5V
5V_CHGR	CN10-8	5v	USB charger on CN1, no debugging. Set JP5 to 5V_CHGR
5V	CN6-5, CN7-18	5v out	Limited by the source you power the board from
3V3	CN6-4, CN7-16	3.3v out / 3.0v–3.6v in	500mA regulator out; as an input up to 1.3A, but the STLINK-V3E is then unpowered
IOREF	CN6-2, CN7-12	3.3v	Tells shields the I/O level (SB39)
VREFP	CN5-8, CN10-7	3.25v / 2.5v / VDD	MCU VREF+, selected by JP8
VBAT	CN7-33	= VDD	Tied to VDD by SB38; open it to run the RTC from a coin cell
GND	CN6-6/7, CN5-7, CN7-8/19/20/22, CN10-9/20	0v	AGND is CN10-32

When you power the board from USB, the board gets 500mA after USB enumeration, for the board plus any shield. ST recommends an external supply when the total goes over 300mA, and LD4 lights up if the USB current goes over 500mA. The power-up order with an external supply is: set JP5, apply the external power, check that the green LD3 LED is on, and only then plug in the USB cable.

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Nucleo-G474RE GPIO Pins

The Nucleo-G474RE has 49 GPIO pins on its Morpho headers, and 22 of them are also on the Arduino headers (D0–D15, A0–A5). They work at 3.3v, and unlike the older F4 Nucleo boards, 18 of them are 3.3v-only (TT pins).

Which Nucleo-G474RE Pins Are 5v Tolerant?

On the Nucleo-G474RE Arduino headers, D1–D5, D7–D10, D14, D15 and A5 are 5v tolerant (FT). A0, A1, A2, A3, A4, D0, D6, D11, D12 and D13 are 3.3v only (TT, 3.6v max). On the Morpho headers, PB1, PB2, PB11–PB15 and PC3 are 3.3v only too.

Arduino Pin	GPIO	5v Tolerant	Arduino Pin	GPIO	5v Tolerant
A0	PA0	No	D6	PB10	No
A1	PA1	No	D7	PA8	Yes
A2	PA4	No	D8	PA9	Yes
A3	PB0	No	D9	PC7	Yes
A4	PC1	No	D10	PB6	Yes
A5	PC0	Yes	D11	PA7	No
D0	PC5	No	D12	PA6	No
D1	PC4	Yes	D13	PA5	No
D2	PA10	Yes	D14	PB9	Yes
D3	PB3	Yes	D15	PB8	Yes
D4	PB5	Yes
D5	PB4	Yes

Each GPIO can be an input (floating, pull-up or pull-down), a push-pull or open-drain output, an analog pin, or an alternate function. Here are the electrical limits from the DS12288 datasheet:

• Absolute max current per pin: ±20mA.
• Total current for all I/Os: 100mA sunk or sourced.
• PC13, PC14 and PC15: 3mA sink max, 2MHz max, never a current source.
• 5v tolerance (FT) only applies while the MCU is powered and the pin isn’t in analog mode.
• The “_f” pins (PA9, PA10, PA13–PA15, PB5, PB7–PB9, PC4, PC6–PC9, PC11, and PF0) support I2C Fast-mode Plus with 20mA drive.

Learn more in our STM32 GPIO Tutorial series.

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Nucleo-G474RE Interrupt Pins

Every GPIO pin on the Nucleo-G474RE can be an external interrupt source. The STM32G474RE has 16 EXTI lines for the pins, one per pin number, so PA0, PB0 and PC0 all share EXTI0, and only one of them can use it at a time.

EXTI Line	Pins That Can Use It	Interrupt Vector
EXTI0 – EXTI4	Px0 – Px4 (one port each)	EXTI0_IRQn … EXTI4_IRQn (one each)
EXTI5 – EXTI9	Px5 – Px9	EXTI9_5_IRQn (shared)
EXTI10 – EXTI15	Px10 – Px15 (B1 = PC13 on EXTI13)	EXTI15_10_IRQn (shared)

The user button B1 on PC13 is the easiest pin to try an interrupt with. On this board it’s wired to VDD with a 100kΩ pull-down, so it reads HIGH when pressed: use a rising-edge trigger, not the falling edge you’d use on the older Nucleo-64 boards. In Arduino, attachInterrupt(digitalPinToInterrupt(USER_BTN), isr, RISING) does it.

Learn more in our STM32 External Interrupt Tutorial.

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Nucleo-G474RE ADC Pins

The Nucleo-G474RE has 5x 12-bit ADCs (up to 4Msps) with 26 external channels; 22 ADC pins are on the Morpho headers, and 13 of them are on the Arduino headers: A0–A5 plus D0, D1, D7, D8, D11, D12 and D13. The ADC reference is VREF+ (3.25v from the on-board reference by default, set by JP8).

Arduino Pin	GPIO	ADC Channel	Header Pins
A0	PA0	ADC12_IN1	CN8-1, CN7-28
A1	PA1	ADC12_IN2	CN8-2, CN7-30
A2	PA4	ADC2_IN17	CN8-3, CN7-32
A3	PB0	ADC1_IN15, ADC3_IN12	CN8-4, CN7-34
A4	PC1	ADC12_IN7	CN8-5, CN7-36
A5	PC0	ADC12_IN6	CN8-6, CN7-38
D0	PC5	ADC2_IN11	CN9-1, CN10-6/37
D1	PC4	ADC2_IN5	CN9-2, CN10-34/35
D7	PA8	ADC5_IN1	CN9-8, CN10-23
D8	PA9	ADC5_IN2	CN5-1, CN10-21
D11	PA7	ADC2_IN4	CN5-4, CN10-15
D12	PA6	ADC2_IN3	CN5-5, CN10-13
D13	PA5	ADC2_IN13 (LED LD2)	CN5-6, CN10-11
–	PB1	ADC1_IN12, ADC3_IN1	CN10-24
–	PB2	ADC2_IN12	CN10-22
–	PB11	ADC12_IN14	CN10-18
–	PB12	ADC1_IN11, ADC4_IN3	CN10-16
–	PB13	ADC3_IN5	CN10-30
–	PB14	ADC1_IN5, ADC4_IN4	CN10-28
–	PB15	ADC2_IN15, ADC4_IN5	CN10-26
–	PC2	ADC12_IN8	CN7-35
–	PC3	ADC12_IN9	CN7-37

Channels named ADC12 can be read by ADC1 or ADC2. ADC3 and ADC4 (PB1, PB12–PB15) and ADC5 (D7, D8) let you sample several signals at exactly the same time, like the phase currents of a motor or the voltage and current of a power converter. Each ADC also has hardware oversampling up to 16-bit, which is handy for slow, precise readings.

There are so many sensors that we can read with the ADC pins, which include: potentiometers, current-sense shunts with the on-chip op-amps, NTC thermistors, LDRs, joysticks, battery voltage dividers, and much more.

Learn more in our STM32 ADC Tutorial series.

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Nucleo-G474RE DAC Pins

The Nucleo-G474RE has 3x 12-bit DAC outputs on pins: DAC1_OUT1 on A2 (PA4), DAC1_OUT2 on D13 (PA5) and DAC2_OUT1 on D12 (PA6). DAC3 and DAC4 have no pins: they feed the comparators and op-amps internally, for example as a comparator threshold.

DAC Output	GPIO	Arduino Pin	Header Pins	Note
DAC1_OUT1	PA4	A2	CN8-3, CN7-32	Clean output, recommended
DAC1_OUT2	PA5	D13	CN5-6, CN10-11	Shares the pin with LED LD2
DAC2_OUT1	PA6	D12	CN5-5, CN10-13	Also SPI1_MISO

In the Arduino core, analogWrite() on a DAC pin uses the DAC instead of PWM.

Learn more in our STM32 DAC Tutorial series.

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Nucleo-G474RE Op-Amp & Comparator Pins

The Nucleo-G474RE has 6 op-amps (OPAMP1–OPAMP6, each usable as a PGA) and 7 comparators (COMP1–COMP7) inside the MCU. They’re what makes the G474 good at current sensing and overcurrent protection: an op-amp amplifies a shunt voltage straight into an ADC, and a comparator can shut down the PWM in nanoseconds.

Op-Amp	Output (VOUT)	Non-inverting Inputs (VINP)	Inverting Inputs (VINM)
OPAMP1	PA2 (VCP, not on a header)	A1 (PA1), PA3, D11 (PA7)	PA3, D0 (PC5)
OPAMP2	D12 (PA6)	D11 (PA7), PB14, A3 (PB0)	D13 (PA5), D0 (PC5)
OPAMP3	PB1 (CN10-24)	A3 (PB0), PB13, A1 (PA1)	PB2, D6 (PB10)
OPAMP4	PB12 (CN10-16)	PB13, PB11	D6 (PB10)
OPAMP5	D7 (PA8)	PB14, PC3	PB15, PA3
OPAMP6	PB11 (CN10-18)	PB12, PB13	A1 (PA1), PB1

Comparator	Input + (INP)	Outputs (OUT)
COMP1	A1 (PA1), PB1	A0 (PA0), D12 (PA6), PA11, D15 (PB8)
COMP2	D11 (PA7), PA3	PA2, D11 (PA7), PA12, D14 (PB9)
COMP3	A0 (PA0), A4 (PC1)	PC2, PB7, PB15
COMP4	A3 (PB0)	PB1, D10 (PB6), PB14
COMP5	PB13	D8 (PA9), D9 (PC7)
COMP6	PB11	D2 (PA10), PC6
COMP7	PB14	D7 (PA8), PC8

The comparator’s negative input can be a pin or an internal source (a DAC3/DAC4 channel or a fraction of VREFINT), so you can set the trip level in software. A comparator output can also go straight to the HRTIM or TIM1/TIM8 fault and break inputs, without a pin at all.

Learn more in our STM32 OpAmp (PGA) Tutorial.

Learn more in our STM32 Comparator Tutorial.

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Nucleo-G474RE PWM Pins

The Nucleo-G474RE has 21 PWM pins on the Arduino headers (D0 and D2–D15, plus A0–A5) and 43 in total across the Morpho headers. The PWM pins are highlighted in orange in the pinout diagrams.

Arduino Pin	GPIO	Timer Channels	Arduino Pin	GPIO	Timer Channels
D0	PC5	TIM1_CH4N	D10	PB6	TIM4_CH1, TIM8_CH1
D2	PA10	TIM1_CH3, HRTIM1_CHB1	D11	PA7	TIM3_CH2, TIM17_CH1
D3	PB3	TIM2_CH2, TIM8_CH1N	D12	PA6	TIM3_CH1, TIM16_CH1
D4	PB5	TIM3_CH2, TIM17_CH1	D13	PA5	TIM2_CH1
D5	PB4	TIM3_CH1, TIM16_CH1	D14	PB9	TIM4_CH4, TIM8_CH3
D6	PB10	TIM2_CH3	D15	PB8	TIM4_CH3, TIM8_CH2
D7	PA8	TIM1_CH1, HRTIM1_CHA1	A0	PA0	TIM2_CH1, TIM5_CH1
D8	PA9	TIM1_CH2, HRTIM1_CHA2	A1	PA1	TIM2_CH2, TIM5_CH2
D9	PC7	TIM3_CH2, TIM8_CH2, HRTIM1_CHF2	A2 / A3	PA4 / PB0	TIM3_CH2 / TIM3_CH3
			A4 / A5	PC1 / PC0	TIM1_CH2 / TIM1_CH1

Pins on the same timer share its frequency, and some pins share the same channel: D13 and A0 can both be TIM2_CH1, and D11, D4 and A2 can all be TIM3_CH2. Two pins on one channel always output the same duty cycle, so pick another timer when you need them separately. TIM2 and TIM5 are 32-bit timers; the rest are 16-bit.

There are so many things that we can control with PWM, which include: LED dimming, DC motor speed (with a driver), servo motors, buzzers, ESCs for brushless motors, and much more.

Calculate your timer settings with this STM32 PWM Calculator.

Learn more in our STM32 PWM Tutorial series.

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Nucleo-G474RE HRTIM & Advanced Timer Pins

The Nucleo-G474RE has a high-resolution timer (HRTIM) with 6 timer units (A–F), 12 outputs and 184ps resolution, plus 3 advanced-control timers (TIM1, TIM8 and TIM20). All 12 HRTIM outputs are on the headers: CHA1 on D7, CHA2 on D8, CHB1 on D2 and CHF2 on D9 on the Arduino headers, and the rest on CN10.

HRTIM Unit	Output 1	Output 2	Header Pins
Timer A	PA8 (D7)	PA9 (D8)	CN9-8 / CN5-1, CN10-23 / CN10-21
Timer B	PA10 (D2)	PA11	CN9-3, CN10-33 / CN10-14
Timer C	PB12	PB13	CN10-16 / CN10-30
Timer D	PB14	PB15	CN10-28 / CN10-26
Timer E	PC8	PC9	CN10-2 / CN10-1
Timer F	PC6	PC7 (D9)	CN10-4 / CN5-2, CN10-19

Each HRTIM unit drives one half-bridge (output 1 and output 2 with dead-time), so the board can run up to 6 half-bridges at once. The HRTIM fault inputs on the headers are FLT1 PA12, FLT2 PA15, FLT3 PB10 (D6), FLT4 PB11, FLT5 PB0 (A3) or PC7 and FLT6 PC10, and the comparators can trigger faults internally.

For 3-phase motor control, TIM1 is the usual choice on the Nucleo-G474RE. Its main and complementary outputs land on these pins:

Timer	CH1 / CH1N	CH2 / CH2N	CH3 / CH3N	CH4	Break (BKIN)
TIM1	PA8 (D7), PC0 (A5) / PA7 (D11), PA11, PB13, PC13	PA9 (D8), PC1 (A4) / PA12, PB0 (A3), PB14	PA10 (D2), PC2 / PB1, PB15, PB9 (D14)	PA11, PC3	PA6, PA14, PA15, PB8, PB10, PB12, PC13
TIM8	PA15, PB6 (D10), PC6 / PA7, PB3 (D3), PC10	PA14, PB8 (D15), PC7 (D9) / PB0, PB4 (D5), PC11	PB9 (D14), PC8 / PB1, PB5 (D4), PC12	PC9	PA0, PA6, PA10, PB7, PD2
TIM20	PB2	PC2	PC8	–	–

A clean set for a 3-phase inverter is TIM1_CH1/2/3 on D7, D8, D2 with CH1N/2N/3N on PB13, PB14, PB15 (CN10-30, CN10-28, CN10-26).

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Nucleo-G474RE UART Pins

The Nucleo-G474RE has 6 UARTs: USART1, USART2, USART3, UART4, UART5 and LPUART1. LPUART1 (PA2/PA3) is wired to the STLINK-V3E Virtual COM port, so printf reaches your PC through the USB cable, and D0/D1 are USART1 (PC5/PC4). This is different from the older Nucleo-64 boards, where the VCP was USART2.

Nucleo-G474RE Default Serial (LPUART1): PA2 (TX) and PA3 (RX), to the PC over USB. Default Arduino UART (USART1): D1 = PC4 (TX) and D0 = PC5 (RX).

UART	TX Pins	RX Pins	Note
LPUART1	PA2 (VCP), PB11, A4 (PC1)	PA3 (VCP), D6 (PB10), A5 (PC0)	STLINK-V3E Virtual COM port
USART1	D1 (PC4), D8 (PA9), D10 (PB6)	D0 (PC5), D2 (PA10), PB7 (CN7-21)	The Arduino UART on D0/D1
USART2	D3 (PB3), PA14	D5 (PB4), PA15	PA2/PA3 are taken by the VCP
USART3	D14 (PB9), D6 (PB10), PC10	D15 (PB8), PB11, PC11
UART4	PC10 (CN7-1)	PC11 (CN7-2)	Morpho only
UART5	PC12 (CN7-3)	PD2 (CN7-4)	Morpho only

There are so many modules that we can interface with the UART pins, which include: GPS modules, Bluetooth modules (HC-05), ESP8266/ESP32 Wi-Fi modules, RS485 transceivers, LIN transceivers, fingerprint sensors, and much more.

Learn more in our STM32 UART Tutorial series.

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Nucleo-G474RE I2C Pins

The Nucleo-G474RE has 4x I2C buses (I2C1–I2C4), all of them up to Fast-mode Plus (1MHz) on the “_f” pins. The default I2C1 pins are D15 (PB8, SCL) and D14 (PB9, SDA), which are the Arduino Uno R3 SCL/SDA pins next to VREFP.

Nucleo-G474RE Default I2C1 Pins: D14 = PB9 (SDA) and D15 = PB8 (SCL).

I2C Bus	SCL Pins	SDA Pins	Note
I2C1	D15 (PB8), PA15, PA13	D14 (PB9), PB7 (CN7-21), PA14	Default Wire bus
I2C2	D8 (PA9), D1 (PC4)	D7 (PA8), PF0
I2C3	D7 (PA8), PC8	D4 (PB5), PC9, PC11
I2C4	PC6, PA13	D9 (PC7), PB7

There are so many modules and sensors that we can interface with the I2C bus, which include: OLED displays (SSD1306), I2C LCDs, RTC modules (DS3231), IMUs (MPU6050), BME280 sensors, EEPROMs, and much more.

Learn more in our STM32 I2C Tutorial series.

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Nucleo-G474RE SPI Pins

The Nucleo-G474RE has 3x SPI ports (SPI1, SPI2, SPI3), and SPI2/SPI3 can also be I²S. The default SPI1 pins are D13 (SCK), D12 (MISO) and D11 (MOSI), just like on an Arduino Uno.

Nucleo-G474RE Default SPI1 Pins: D13 = PA5 (SCK), D12 = PA6 (MISO), D11 = PA7 (MOSI), and any GPIO (usually D10) as CS.

SPI Port	SCK	MISO	MOSI	NSS
SPI1	D13 (PA5), D3 (PB3)	D12 (PA6), D5 (PB4)	D11 (PA7), D4 (PB5)	A2 (PA4), PA15
SPI2	PB13, PF1	D2 (PA10), PB14	PA11, PB15	PB12, PF0
SPI3	D3 (PB3), PC10	D5 (PB4), PC11	D4 (PB5), PC12	A2 (PA4), PA15

There are so many modules that we can interface with the SPI bus, which include: TFT displays (ILI9341, ST7735), SD card modules, nRF24L01 radios, MAX7219 LED drivers, W5500 Ethernet modules, and much more.

Learn more in our STM32 SPI Tutorial series.

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Nucleo-G474RE CAN (FDCAN) Pins

The Nucleo-G474RE has 3x FDCAN controllers that support both classic CAN 2.0 and CAN FD (up to 64-byte payloads, faster data phase). FDCAN1 is on D15 (PB8, RX) and D14 (PB9, TX), the same pins as I2C1.

FDCAN	RX Pins	TX Pins
FDCAN1	D15 (PB8), PA11 (CN10-14)	D14 (PB9), PA12 (CN10-12)
FDCAN2	D4 (PB5), PB12 (CN10-16)	D10 (PB6), PB13 (CN10-30)
FDCAN3	D7 (PA8), D3 (PB3)	PA15 (CN7-17), D5 (PB4)

D14/D15 can be I2C1 or FDCAN1, never both at once. If you need both, move FDCAN1 to PA11/PA12 (and give up USB) or use FDCAN2 on D4/D10.

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Nucleo-G474RE USB & USB-C (UCPD) Pins

The STM32G474RE has a USB 2.0 full-speed device and a USB Type-C Power Delivery controller (UCPD), but the Nucleo-G474RE’s Micro-B connector only goes to the STLINK-V3E. To use the MCU’s own USB, wire a USB connector to PA11 (D−) and PA12 (D+) on CN10. The UCPD CC lines are on D10 (PB6, CC1) and D5 (PB4, CC2).

Signal	GPIO	Header Pins	Note
USB_DM (D−)	PA11	CN10-14	USB FS device, on-chip PHY
USB_DP (D+)	PA12	CN10-12	Internal 1.5kΩ pull-up
UCPD1_CC1	PB6	D10, CN10-17	Type-C configuration channel 1
UCPD1_CC2	PB4	D5, CN10-27	Type-C configuration channel 2
UCPD1_DBCC1	PA9	D8, CN10-21	Dead-battery control for CC1
UCPD1_DBCC2	PA10	D2, CN10-33	Dead-battery control for CC2

The USB peripheral needs an accurate 48MHz clock. You can get it from the PLL with the 24MHz crystal, or from the internal HSI48 trimmed by the CRS (clock recovery system) from the USB SOF packets. For USB-C power delivery, ST’s USB Type-C expansion shields (like the X-NUCLEO-SNK1M1) plug into the Arduino headers and use these CC pins.

Learn more in our STM32 USB CDC Tutorial.

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Nucleo-G474RE Debug (SWD) & Boot Pins

The Nucleo-G474RE is programmed and debugged over SWD on PA13 (SWDIO) and PA14 (SWCLK), with PB3 (SWO) for trace output, all wired to the on-board STLINK-V3E. The boot pin is PB8-BOOT0, which is also D15 and CN7-7.

Pin	Header Pin	Function After Reset
PA13	CN7-13	SWDIO (JTMS), pull-up
PA14	CN7-15	SWCLK (JTCK), pull-down
PB3	D3, CN10-31	SWO (JTDO), to the STLINK-V3E via SB15
PA15	CN7-17	JTDI, pull-up (to CN4 via SB9)
PB4	D5, CN10-27	NJTRST, pull-up
NRST (PG10)	CN6-3, CN7-14	Reset (B2 button, STLINK-V3E)
PB8-BOOT0	D15, CN10-3, CN7-7	GPIO or BOOT0, set by option bytes; JP7 adds a pull-down

On the STM32G4, the boot mode comes from the nBOOT1 option bit plus either the PB8-BOOT0 pin or the nBOOT0 option bit; the nSWBOOT0 option bit decides which. UM2505 states that BOOT0 isn’t connected by default on this board and that the boot function is handled by the option bytes. PB8 reaches both D15 (SB2) and CN7-7 (SB4) by default, and jumper JP7 (open by default) adds a pull-down to it.

nSWBOOT0	Boot Source	PB8 (D15)
0	nBOOT0 option bit (1 = main Flash)	Free GPIO at reset
1	The PB8-BOOT0 pin (LOW = main Flash, HIGH = system bootloader with nBOOT1 = 1)	Must be LOW at reset to run your code; fit JP7

To start the system bootloader on purpose, set nSWBOOT0 = 1, tie D15 (CN7-7) to 3.3v and reset the board. The G474 bootloader supports USART1/2/3, LPUART1, I2C2/3, SPI1/2, FDCAN1 and USB DFU (ST application note AN2606). To debug another board with the on-board STLINK-V3E, fit JP1 to hold it off the local MCU and use the 14-pin CN4 STDC14 connector.

Learn more in our STM32 SWD Debugging Tutorial.

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Nucleo-G474RE On-Board Features

Besides the headers, the Nucleo-G474RE has 4 LEDs, 2 buttons, two crystals, a few jumpers, and 41 solder bridges. Here’s what each one does.

Part	Pin / Connection	What It Does
LD1 COM (red/green)	STLINK-V3E	Blinking red: USB enumeration. Red: ready. Blinking red/green: communicating. Green: success. Orange: communication failure
LD2 USER (green)	PA5 / D13 (SB6)	HIGH = on (through a transistor)
LD3 5V_PWR (green)	+5V	The board has 5v
LD4 OC (red)	STLINK USB	USB overcurrent (more than 500mA)
B1 USER (blue)	PC13 (SB16)	Wired to VDD with a 100kΩ pull-down: reads HIGH when pressed
B2 RESET (black)	NRST	Resets the MCU
X3	PF0/PF1	24MHz HSE crystal
X2	PC14/PC15	32.768kHz LSE crystal for the RTC
JP1	STLINK-V3E	ON: holds the STLINK-V3E in reset (for an external probe on CN4)
JP5	Power select	5V_STLK (default), 5V_VIN, E5V or 5V_CHGR
JP6 (IDD)	MCU supply	Remove it and insert an ammeter to measure the MCU current
JP7	PB8-BOOT0	Open by default; fit it to pull BOOT0 LOW
JP8	VREF+	On-board reference (3.25v default, 2.5v with SB14) or VDD

Nucleo-G474RE Solder Bridges

These are the solder bridges you’re most likely to change (UM2505 Table 12, defaults in bold there):

Bridge	Default	Effect
SB17, SB23	ON	LPUART1 (PA2/PA3) to the STLINK-V3E Virtual COM port
SB18, SB22	OFF	PA2/PA3 not on D1/D0
SB13, SB19	ON	USART1 (PC4/PC5) on D1/D0
SB12, SB20	OFF	USART1 not on the Virtual COM port (swap with SB17/SB23 to move the VCP)
SB35, SB36	ON	A4 = PC1, A5 = PC0
SB34, SB37	OFF	Close for I2C1 (PB9/PA15) on A4/A5
SB2, SB4	ON	PB8 on D15 and CN7-7
SB6	ON	LED LD2 on PA5
SB16	ON	B1 button on PC13 (SB21 moves it to PA0)
SB15	ON	SWO (PB3) to the STLINK-V3E
SB25, SB26	ON	24MHz crystal X3 on PF0/PF1 (SB24/SB28 OFF: not on CN7)
SB30, SB31	ON	32.768kHz crystal X2 on PC14/PC15 (SB29/SB32 OFF: not on CN7)
SB38	ON	VBAT = VDD
SB39	ON	IOREF = 3.3v
SB3, SB33	ON	PC5 on CN10-6, PC4 on CN10-34

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Getting Started With Nucleo-G474RE

You can program the Nucleo-G474RE with any of the common STM32 toolchains, and the STLINK-V3E on board means you don’t need anything else besides a Micro-USB cable.

• STM32CubeIDE: start a new project from the Board Selector, pick NUCLEO-G474RE, and let CubeMX set up LD2, B1 and LPUART1 for you. For the full 170MHz, run the PLL from the 24MHz HSE and enable the boost mode (Range 1 boost).
• Arduino IDE (STM32duino): install “STM32 MCU based boards”, then choose Board: “Nucleo-64” and Board part number: “Nucleo G474RE”.
• PlatformIO: board ID nucleo_g474re, with the STM32Cube, Arduino or Zephyr framework.
• Zephyr RTOS: board name nucleo_g474re.
• Drag-and-drop: the board shows up as a USB drive; copy a .bin file onto it to flash it.

Arduino Name	Pin	Default
Serial	PA2 / PA3 (LPUART1)	To the PC through the STLINK-V3E
Wire	PB9 (SDA, D14), PB8 (SCL, D15)	I2C1
SPI	D13 / D12 / D11	SPI1
LED_BUILTIN	PA5 (D13)	LD2
USER_BTN	PC13	B1 (HIGH when pressed)

Here’s the classic first test, blinking LD2 and printing the button state to the Serial Monitor at 115200 baud:

With STM32CubeIDE and HAL, the same blink is HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5); in the main loop. Follow the STM32 LED Blink Code Example for the full walk-through, and set up the clock tree with the STM32 RCC Clock Configuration Guide.

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Nucleo-G474RE Common Problems & Fixes

Why doesn’t printf show up on my PC? The Virtual COM port is LPUART1 on PA2/PA3, not USART2 like on other Nucleo-64 boards. Initialize LPUART1 and retarget printf to it (ST Community).

Why doesn’t my shield’s serial work on D0/D1? D0/D1 are USART1 (PC5/PC4), so configure USART1, not the VCP UART. In Arduino, create HardwareSerial Serial1(PC5, PC4); for them.

Why is PB4 (D5) always HIGH? It’s NJTRST after reset, with an internal pull-up. Set debug to Serial Wire to free it (ST Community).

Why are PB6 (D10) and PB4 (D5) pulled LOW? The UCPD dead-battery pull-downs are on while PA9/PA10 are HIGH. Call HAL_PWREx_DisableUCPDDeadBattery().

Why does the button read the opposite of what I expect? B1 on this board reads HIGH when pressed (it’s wired to VDD), unlike the F4 Nucleo-64 boards where it reads LOW.

Why doesn’t my I2C shield respond on A4/A5? A4/A5 are PC1/PC0, not I2C pins. Use D14 (SDA) and D15 (SCL) with pull-ups, or fit SB34/SB37.

Why does my board start the bootloader instead of my program? PB8 (D15) is BOOT0. If nSWBOOT0 = 1 and something pulls D15 HIGH at reset, the bootloader runs. Clear nSWBOOT0 in STM32CubeProgrammer or fit JP7.

Why did a 5v sensor damage A0 or D13? A0–A4, D0, D6 and D11–D13 are 3.3v-only TT pins on the G474RE. Use a level shifter on those pins.

Why doesn’t USART3 work on PB10/PB11? Users report it was fixed by updating STM32CubeMX and the HAL/LL drivers; it works on PC10/PC11 meanwhile (ST Community).

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Nucleo-G474RE vs Nucleo-F446RE

The Nucleo-G474RE and the Nucleo-F446RE have the same Nucleo-64 shape and Arduino/Morpho header positions, but a different PCB (MB1367 vs MB1136), a different debugger, and very different MCUs:

Feature	Nucleo-F446RE	Nucleo-G474RE
MCU clock	180MHz	170MHz
Flash / RAM	512KB / 128KB	512KB / 128KB
ADC	3x 12-bit, 2.4Msps	5x 12-bit, 4Msps
DAC outputs	2	3 (+4 internal)
Op-amps / comparators	No	6 / 7
High-resolution timer	No	HRTIM, 184ps, 12 outputs
CAN	2x CAN 2.0B	3x FDCAN (CAN FD)
USB	OTG FS + OTG HS	FS device + UCPD (Type-C PD)
Debugger	ST-LINK/V2-1, Mini-B	STLINK-V3E, Micro-B
Virtual COM port	USART2 (PA2/PA3)	LPUART1 (PA2/PA3)
D0/D1	Not connected by default	USART1 (PC5/PC4)
HSE clock	8MHz MCO from the ST-LINK	24MHz crystal
B1 button	LOW when pressed	HIGH when pressed
3.3v-only header pins	2 (A2, D13)	10 on the Arduino headers

Pick the Nucleo-G474RE for power conversion, motor control and anything analog-heavy: HRTIM, the op-amps and comparators, and CAN FD are the reasons to buy it. Pick the Nucleo-F446RE when you need more 5v-tolerant pins, USB OTG host, or the extra 10MHz.

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Nucleo-G474RE Pin Details

Here is every Nucleo-G474RE header pin in physical order, with its main functions, all its alternate functions, its 5v tolerance, and a short description. The Arduino headers come first, then the two ST Morpho headers.

Nucleo-G474RE Arduino Header Pins (CN5, CN6, CN8, CN9)

Pin	Label	GPIO	Main Functions	All Alternate Functions	5v Tolerant	Description
CN6-1	NC	–	–	–	–	Not connected.
CN6-2	IOREF	–	3.3v (SB39)	–	–	3.3v I/O reference for shields (SB39).
CN6-3	RESET	–	NRST	–	–	NRST: pull it LOW to reset the MCU.
CN6-4	3V3	–	3.3v in/out	–	–	3.3v output from the LD39050 regulator (500mA), or a 3.0v–3.6v input.
CN6-5	5V	–	5v out	–	–	5v output from USB, VIN or E5V.
CN6-6	GND	–	–	–	–	Ground.
CN6-7	GND	–	–	–	–	Ground.
CN6-8	VIN	–	7v–12v in	–	–	7v–12v input to the LD1117 5v regulator (JP5 on VIN).
CN8-1	A0	PA0	ADC12_IN1, TIM2_CH1, TIM5_CH1, USART2_CTS, WKUP1, COMP1_OUT	TIM2_CH1, TIM5_CH1, USART2_CTS, USART2_NSS, COMP1_OUT, TIM8_BKIN, TIM8_ETR, TIM2_ETR, ADC1_IN1, ADC2_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2, SYS_WKUP1	No (3.3v only)	A0 analog input (ADC12_IN1), WKUP1 and TIM2/TIM5 channel 1 PWM; 3.3v only.
CN8-2	A1	PA1	ADC12_IN2, TIM2_CH2, TIM5_CH2, USART2_RTS	RTC_REFIN, TIM2_CH2, TIM5_CH2, USART2_DE, USART2_RTS, TIM15_CH1N, ADC1_IN2, ADC2_IN2, COMP1_INP, OPAMP1_VINP, OPAMP1_VINP_SEC, OPAMP3_VINP, OPAMP3_VINP_SEC, OPAMP6_VINM, OPAMP6_VINM0, OPAMP6_VINM_SEC	No (3.3v only)	A1 analog input (ADC12_IN2), OPAMP1/OPAMP3 input and TIM2/TIM5 channel 2 PWM; 3.3v only.
CN8-3	A2	PA4	ADC2_IN17, DAC1_OUT1, TIM3_CH2, USART2_CK, SPI1_NSS, SPI3_NSS, SAI1_FS_B, I2S3_WS	TIM3_CH2, SPI1_NSS, I2S3_WS, SPI3_NSS, USART2_CK, SAI1_FS_B, ADC2_IN17, COMP1_INM, DAC1_OUT1	No (3.3v only)	A2 analog input and DAC1_OUT1, the cleanest DAC output on the board; 3.3v only.
CN8-4	A3	PB0	ADC1_IN15, ADC3_IN12, TIM3_CH3, TIM1_CH2N, QSPI_IO1	TIM3_CH3, TIM8_CH2N, TIM1_CH2N, QUADSPI1_BK1_IO1, HRTIM1_FLT5, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC1_IN15, ADC3_IN12, COMP4_INP, OPAMP2_VINP, OPAMP2_VINP_SEC, OPAMP3_VINP, OPAMP3_VINP_SEC	No (3.3v only)	A3 analog input (ADC1_IN15, ADC3_IN12), OPAMP2/OPAMP3 input and TIM3_CH3/TIM1_CH2N; 3.3v only.
CN8-5	A4	PC1	ADC12_IN7, TIM1_CH2, LPUART1_TX, SAI1_SD_A	LPTIM1_OUT, TIM1_CH2, LPUART1_TX, QUADSPI1_BK2_IO0, SAI1_SD_A, ADC1_IN7, ADC2_IN7, COMP3_INP	No (3.3v only)	A4 analog input (ADC12_IN7), TIM1_CH2 and LPUART1_TX; 3.3v only, and not I2C by default.
CN8-6	A5	PC0	ADC12_IN6, TIM1_CH1, LPUART1_RX	LPTIM1_IN1, TIM1_CH1, LPUART1_RX, ADC1_IN6, ADC2_IN6, COMP3_INM	Yes	A5 analog input (ADC12_IN6), TIM1_CH1 and LPUART1_RX; 5v tolerant as a digital pin.
CN5-10	D15	PB8	TIM4_CH3, TIM8_CH2, USART3_RX, I2C1_SCL, FDCAN1_RX, BOOT0, COMP1_OUT	TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, HRTIM1_EEV8, SAI1_MCLK_A	Yes	D15 and CN7-7: the default I2C1_SCL (Wire), FDCAN1_RX and TIM4_CH3; also the BOOT0 pin.
CN5-9	D14	PB9	TIM4_CH4, TIM8_CH3, USART3_TX, I2C1_SDA, FDCAN1_TX, COMP2_OUT, SAI1_FS_A	TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N, HRTIM1_EEV5, SAI1_FS_A, DAC1_EXTI9, DAC2_EXTI9, DAC3_EXTI9, DAC4_EXTI9	Yes	D14: the default I2C1_SDA (Wire), FDCAN1_TX, USART3_TX and TIM4_CH4 PWM.
CN5-8	VREFP	–	VREF+ (JP8)	–	–	MCU VREF+: 3.25v (or 2.5v) reference or VDD, set by JP8.
CN5-7	GND	–	–	–	–	Ground.
CN5-6	D13	PA5	ADC2_IN13, DAC1_OUT2, TIM2_CH1, SPI1_SCK, LED LD2	TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC2_IN13, COMP2_INM, DAC1_OUT2, OPAMP2_VINM, OPAMP2_VINM0, OPAMP2_VINM_SEC	No (3.3v only)	D13: drives the green user LED LD2 (SB6), SPI1_SCK, DAC1_OUT2 and TIM2_CH1; 3.3v only.
CN5-5	D12	PA6	ADC2_IN3, DAC2_OUT1, TIM3_CH1, TIM16_CH1, LPUART1_CTS, SPI1_MISO, COMP1_OUT, QSPI_IO3	TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, QUADSPI1_BK1_IO3, LPUART1_CTS, ADC2_IN3, DAC2_OUT1, OPAMP2_VOUT	No (3.3v only)	D12: SPI1_MISO, DAC2_OUT1, OPAMP2 output and TIM3_CH1/TIM16_CH1 PWM; 3.3v only.
CN5-4	D11	PA7	ADC2_IN4, TIM3_CH2, TIM17_CH1, SPI1_MOSI, COMP2_OUT, QSPI_IO2	TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, QUADSPI1_BK1_IO2, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC2_IN4, COMP2_INP, OPAMP1_VINP, OPAMP1_VINP_SEC, OPAMP2_VINP, OPAMP2_VINP_SEC	No (3.3v only)	D11: SPI1_MOSI, ADC2_IN4, COMP2 input and TIM3_CH2/TIM17_CH1 PWM; 3.3v only.
CN5-3	D10	PB6	TIM4_CH1, TIM8_CH1, USART1_TX, FDCAN2_TX, COMP4_OUT, SAI1_FS_B	TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, FDCAN2_TX, TIM8_BKIN2, LPTIM1_ETR, HRTIM1_SCIN, HRTIM1_EEV4, SAI1_FS_B, UCPD1_CC1	Yes	D10: UCPD1_CC1, USART1_TX, FDCAN2_TX and TIM4_CH1/TIM8_CH1 PWM.
CN5-2	D9	PC7	TIM3_CH2, HRTIM1_CHF2, I2C4_SDA, COMP5_OUT, I2S3_MCK	TIM3_CH2, HRTIM1_FLT5, TIM8_CH2, I2S3_MCK, COMP5_OUT, I2C4_SDA, HRTIM1_CHF2	Yes	D9: HRTIM1_CHF2, TIM3_CH2/TIM8_CH2, I2C4_SDA and COMP5_OUT.
CN5-1	D8	PA9	ADC5_IN2, TIM1_CH2, HRTIM1_CHA2, USART1_TX, I2C2_SCL, I2C3_SMBA, COMP5_OUT, SAI1_FS_A	I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, COMP5_OUT, TIM15_BKIN, TIM2_CH3, HRTIM1_CHA2, SAI1_FS_A, ADC5_IN2, DAC1_EXTI9, DAC2_EXTI9, DAC3_EXTI9, DAC4_EXTI9, UCPD1_DBCC1	Yes	D8: HRTIM1_CHA2, TIM1_CH2 and USART1_TX; driving it HIGH enables the UCPD dead-battery pull-down on PB6.
CN9-8	D7	PA8	ADC5_IN1, OPAMP5_VOUT, TIM1_CH1, HRTIM1_CHA1, USART1_CK, I2C2_SDA, I2C3_SCL, FDCAN3_RX, MCO, COMP7_OUT	RCC_MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, COMP7_OUT, TIM4_ETR, FDCAN3_RX, SAI1_CK2, HRTIM1_CHA1, SAI1_SCK_A, ADC5_IN1, OPAMP5_VOUT	Yes	D7: HRTIM1_CHA1, TIM1_CH1, OPAMP5 output, FDCAN3_RX and the MCO clock output.
CN9-7	D6	PB10	TIM2_CH3, USART3_TX, LPUART1_RX, SAI1_SCK_A	TIM2_CH3, USART3_TX, LPUART1_RX, QUADSPI1_CLK, TIM1_BKIN, HRTIM1_FLT3, SAI1_SCK_A, COMP5_INM, DAC1_EXTI10, DAC2_EXTI10, DAC3_EXTI10, DAC4_EXTI10, OPAMP3_VINM, OPAMP3_VINM1, OPAMP3_VINM_SEC, OPAMP4_VINM, OPAMP4_VINM0, OPAMP4_VINM_SEC	No (3.3v only)	D6: TIM2_CH3 PWM, USART3_TX, LPUART1_RX and HRTIM1_FLT3; 3.3v only.
CN9-6	D5	PB4	TIM3_CH1, TIM16_CH1, USART2_RX, UART5_RTS, SPI1_MISO, SPI3_MISO, FDCAN3_TX, NJTRST, SAI1_MCLK_B	SYS_JTRST, TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO, USART2_RX, UART5_DE, UART5_RTS, TIM17_BKIN, FDCAN3_TX, HRTIM1_EEV7, SAI1_MCLK_B, UCPD1_CC2	Yes	D5: NJTRST (pull-up) after reset and UCPD1_CC2, then SPI1/SPI3_MISO, TIM3_CH1 or FDCAN3_TX.
CN9-5	D4	PB5	TIM3_CH2, TIM17_CH1, UART5_CTS, USART2_CK, SPI1_MOSI, SPI3_MOSI, I2C3_SDA, I2C1_SMBA, FDCAN2_RX, SAI1_SD_B, I2S3_SD	TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, I2S3_SD, SPI3_MOSI, USART2_CK, I2C3_SDA, FDCAN2_RX, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B, HRTIM1_EEV6, UART5_CTS	Yes	D4: SPI1/SPI3_MOSI, I2C3_SDA, FDCAN2_RX and TIM3_CH2/TIM17_CH1 PWM.
CN9-4	D3	PB3	TIM2_CH2, TIM8_CH1N, USART2_TX, SPI1_SCK, SPI3_SCK, FDCAN3_RX, SWO, SAI1_SCK_B	SYS_JTDO-SWO, TIM2_CH2, TIM4_ETR, CRS_SYNC, TIM8_CH1N, SPI1_SCK, I2S3_CK, SPI3_SCK, USART2_TX, TIM3_ETR, FDCAN3_RX, HRTIM1_SCOUT, HRTIM1_EEV9, SAI1_SCK_B, ADC3_EXTI3, ADC4_EXTI3, ADC5_EXTI3	Yes	D3: SWO trace output to the STLINK-V3E (SB15), then SPI1/SPI3_SCK, TIM2_CH2 or FDCAN3_RX.
CN9-3	D2	PA10	TIM1_CH3, HRTIM1_CHB1, USART1_RX, SPI2_MISO, I2C2_SMBA, PVD_IN, COMP6_OUT	TIM17_BKIN, CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, COMP6_OUT, TIM2_CH4, TIM8_BKIN, SAI1_D1, HRTIM1_CHB1, SAI1_SD_A, DAC1_EXTI10, DAC2_EXTI10, DAC3_EXTI10, DAC4_EXTI10, SYS_PVD_IN, UCPD1_DBCC2	Yes	D2: HRTIM1_CHB1, TIM1_CH3 and USART1_RX; driving it HIGH enables the UCPD dead-battery pull-down on PB4.
CN9-2	D1	PC4	ADC2_IN5, USART1_TX, I2C2_SCL	TIM1_ETR, I2C2_SCL, USART1_TX, QUADSPI1_BK2_IO3, ADC2_IN5	Yes	D1: USART1_TX (the default header serial TX), I2C2_SCL and ADC2_IN5; also on CN10-34 and CN10-35.
CN9-1	D0	PC5	ADC2_IN11, TIM1_CH4N, USART1_RX, WKUP5	TIM15_BKIN, SAI1_D3, TIM1_CH4N, USART1_RX, HRTIM1_EEV10, ADC2_IN11, OPAMP1_VINM, OPAMP1_VINM1, OPAMP1_VINM_SEC, OPAMP2_VINM, OPAMP2_VINM1, OPAMP2_VINM_SEC, SYS_WKUP5	No (3.3v only)	D0: USART1_RX (the default header serial RX), ADC2_IN11 and WKUP5; 3.3v only; also on CN10-6 and CN10-37.

Nucleo-G474RE Morpho CN7 Pins

On CN7, pin 1 is at the end nearest the STLINK-V3E, and odd pins are on the outer column.

Pin	Label	GPIO	Main Functions	All Alternate Functions	5v Tolerant	Description
CN7-1	–	PC10	TIM8_CH1N, UART4_TX, USART3_TX, SPI3_SCK, I2S3_CK	TIM8_CH1N, UART4_TX, I2S3_CK, SPI3_SCK, USART3_TX, HRTIM1_FLT6, DAC1_EXTI10, DAC2_EXTI10, DAC3_EXTI10, DAC4_EXTI10	Yes	Morpho only: UART4_TX/USART3_TX, SPI3_SCK and TIM8_CH1N.
CN7-2	–	PC11	TIM8_CH2N, UART4_RX, USART3_RX, SPI3_MISO, I2C3_SDA	HRTIM1_EEV2, TIM8_CH2N, UART4_RX, SPI3_MISO, USART3_RX, I2C3_SDA, ADC1_EXTI11, ADC2_EXTI11	Yes	Morpho only: UART4_RX/USART3_RX, SPI3_MISO and I2C3_SDA.
CN7-3	–	PC12	TIM5_CH2, TIM8_CH3N, UART5_TX, USART3_CK, SPI3_MOSI, I2S3_SD	TIM5_CH2, HRTIM1_EEV1, TIM8_CH3N, UART5_TX, I2S3_SD, SPI3_MOSI, USART3_CK, UCPD1_FRSTX1, UCPD1_FRSTX2	Yes	Morpho only: UART5_TX, SPI3_MOSI and TIM8_CH3N.
CN7-4	–	PD2	UART5_RX	TIM3_ETR, TIM8_BKIN, UART5_RX, ADC3_EXTI2, ADC4_EXTI2, ADC5_EXTI2	Yes	Morpho only: UART5_RX and TIM3_ETR.
CN7-5	VDD	–	3.3v (VDD)	–	–	3.3v MCU supply (VDD).
CN7-6	E5V	–	5v external in	–	–	External 5v input (4.75v–5.25v, 500mA) with JP5 on E5V.
CN7-7	D15	PB8	TIM4_CH3, TIM8_CH2, USART3_RX, I2C1_SCL, FDCAN1_RX, BOOT0	TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, HRTIM1_EEV8, SAI1_MCLK_A	Yes	D15 and CN7-7: the default I2C1_SCL (Wire), FDCAN1_RX and TIM4_CH3; also the BOOT0 pin.
CN7-8	GND	–	–	–	–	Ground.
CN7-9	NC	–	–	–	–	Not connected.
CN7-10	NC	–	–	–	–	Not connected.
CN7-11	NC	–	–	–	–	Not connected.
CN7-12	IOREF	–	3.3v (SB39)	–	–	3.3v I/O reference for shields (SB39).
CN7-13	–	PA13	TIM4_CH3, TIM16_CH1N, USART3_CTS, I2C1_SCL, I2C4_SCL, SWDIO, SAI1_SD_B	SYS_JTMS-SWDIO, TIM16_CH1N, I2C4_SCL, I2C1_SCL, IR_OUT, USART3_CTS, USART3_NSS, TIM4_CH3, SAI1_SD_B	Yes	SWDIO, used by the on-board STLINK-V3E to program and debug the MCU; leave it alone.
CN7-14	RESET	–	NRST	–	–	NRST: pull it LOW to reset the MCU.
CN7-15	–	PA14	TIM8_CH2, USART2_TX, I2C1_SDA, I2C4_SMBA, SWCLK, SAI1_FS_B	SYS_JTCK-SWCLK, LPTIM1_OUT, I2C4_SMBA, I2C1_SDA, TIM8_CH2, TIM1_BKIN, USART2_TX, SAI1_FS_B	Yes	SWCLK, used by the on-board STLINK-V3E to program and debug the MCU; leave it alone.
CN7-16	3V3	–	3.3v in/out	–	–	3.3v output from the LD39050 regulator (500mA), or a 3.0v–3.6v input.
CN7-17	–	PA15	TIM2_CH1, TIM8_CH1, USART2_RX, UART4_RTS, SPI1_NSS, SPI3_NSS, I2C1_SCL, FDCAN3_TX, JTDI, I2S3_WS	SYS_JTDI, TIM2_CH1, TIM8_CH1, I2C1_SCL, SPI1_NSS, I2S3_WS, SPI3_NSS, USART2_RX, UART4_DE, UART4_RTS, TIM1_BKIN, FDCAN3_TX, HRTIM1_FLT2, TIM2_ETR, ADC1_EXTI15, ADC2_EXTI15	Yes	JTDI after reset, then TIM2_CH1/TIM8_CH1, SPI1/SPI3_NSS, I2C1_SCL or FDCAN3_TX.
CN7-18	5V	–	5v out	–	–	5v output from USB, VIN or E5V.
CN7-19	GND	–	–	–	–	Ground.
CN7-20	GND	–	–	–	–	Ground.
CN7-21	–	PB7	TIM3_CH4, TIM4_CH2, USART1_RX, UART4_CTS, I2C1_SDA, I2C4_SDA, COMP3_OUT	TIM17_CH1N, TIM4_CH2, I2C4_SDA, I2C1_SDA, TIM8_BKIN, USART1_RX, COMP3_OUT, TIM3_CH4, LPTIM1_IN2, HRTIM1_EEV3, UART4_CTS	Yes	Morpho only: USART1_RX, I2C1_SDA/I2C4_SDA and TIM4_CH2/TIM3_CH4 PWM.
CN7-22	GND	–	–	–	–	Ground.
CN7-23	–	PC13	TIM1_CH1N, TIM8_CH4N, B1 USER, WKUP2	TIM1_BKIN, TIM1_CH1N, TIM8_CH4N, RTC_OUT1, RTC_TAMP1, RTC_TS, SYS_WKUP2	Yes	The blue user button B1 (reads HIGH when pressed); a backup-domain pin (3mA sink max, never a source).
CN7-24	VIN	–	7v–12v in	–	–	7v–12v input to the LD1117 5v regulator (JP5 on VIN).
CN7-25	–	PC14	OSC32_IN	RCC_OSC32_IN	Yes	OSC32_IN for the 32.768kHz LSE crystal X2; not connected to the header by default (SB32).
CN7-26	NC	–	–	–	–	Not connected.
CN7-27	–	PC15	OSC32_OUT	ADC1_EXTI15, ADC2_EXTI15, RCC_OSC32_OUT	Yes	OSC32_OUT for the 32.768kHz LSE crystal X2; not connected to the header by default (SB29).
CN7-28	A0	PA0	ADC12_IN1, TIM2_CH1, TIM5_CH1, USART2_CTS, WKUP1, COMP1_OUT	TIM2_CH1, TIM5_CH1, USART2_CTS, USART2_NSS, COMP1_OUT, TIM8_BKIN, TIM8_ETR, TIM2_ETR, ADC1_IN1, ADC2_IN1, COMP1_INM, COMP3_INP, RTC_TAMP2, SYS_WKUP1	No (3.3v only)	A0 analog input (ADC12_IN1), WKUP1 and TIM2/TIM5 channel 1 PWM; 3.3v only.
CN7-29	–	PF0	OSC_IN	I2C2_SDA, I2S2_WS, SPI2_NSS, TIM1_CH3N, ADC1_IN10, RCC_OSC_IN	Yes	OSC_IN for the 24MHz HSE crystal X3; not connected to the header by default (SB28).
CN7-30	A1	PA1	ADC12_IN2, TIM2_CH2, TIM5_CH2, USART2_RTS	RTC_REFIN, TIM2_CH2, TIM5_CH2, USART2_DE, USART2_RTS, TIM15_CH1N, ADC1_IN2, ADC2_IN2, COMP1_INP, OPAMP1_VINP, OPAMP1_VINP_SEC, OPAMP3_VINP, OPAMP3_VINP_SEC, OPAMP6_VINM, OPAMP6_VINM0, OPAMP6_VINM_SEC	No (3.3v only)	A1 analog input (ADC12_IN2), OPAMP1/OPAMP3 input and TIM2/TIM5 channel 2 PWM; 3.3v only.
CN7-31	–	PF1	OSC_OUT	I2S2_CK, SPI2_SCK, ADC2_IN10, COMP3_INM, RCC_OSC_OUT	Yes	OSC_OUT for the 24MHz HSE crystal X3; not connected to the header by default (SB24).
CN7-32	A2	PA4	ADC2_IN17, DAC1_OUT1, TIM3_CH2, USART2_CK, SPI1_NSS, SPI3_NSS, SAI1_FS_B, I2S3_WS	TIM3_CH2, SPI1_NSS, I2S3_WS, SPI3_NSS, USART2_CK, SAI1_FS_B, ADC2_IN17, COMP1_INM, DAC1_OUT1	No (3.3v only)	A2 analog input and DAC1_OUT1, the cleanest DAC output on the board; 3.3v only.
CN7-33	VBAT	–	= VDD (SB38)	–	–	RTC/backup supply, tied to VDD by SB38.
CN7-34	A3	PB0	ADC1_IN15, ADC3_IN12, TIM3_CH3, TIM1_CH2N, QSPI_IO1	TIM3_CH3, TIM8_CH2N, TIM1_CH2N, QUADSPI1_BK1_IO1, HRTIM1_FLT5, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC1_IN15, ADC3_IN12, COMP4_INP, OPAMP2_VINP, OPAMP2_VINP_SEC, OPAMP3_VINP, OPAMP3_VINP_SEC	No (3.3v only)	A3 analog input (ADC1_IN15, ADC3_IN12), OPAMP2/OPAMP3 input and TIM3_CH3/TIM1_CH2N; 3.3v only.
CN7-35	–	PC2	ADC12_IN8, TIM1_CH3, TIM20_CH2, COMP3_OUT	LPTIM1_IN2, TIM1_CH3, COMP3_OUT, TIM20_CH2, QUADSPI1_BK2_IO1, ADC1_IN8, ADC2_IN8, ADC3_EXTI2, ADC4_EXTI2, ADC5_EXTI2	Yes	Morpho only: ADC12_IN8, TIM1_CH3, TIM20_CH2 and COMP3_OUT.
CN7-36	A4	PC1	ADC12_IN7, TIM1_CH2, LPUART1_TX, SAI1_SD_A	LPTIM1_OUT, TIM1_CH2, LPUART1_TX, QUADSPI1_BK2_IO0, SAI1_SD_A, ADC1_IN7, ADC2_IN7, COMP3_INP	No (3.3v only)	A4 analog input (ADC12_IN7), TIM1_CH2 and LPUART1_TX; 3.3v only, and not I2C by default.
CN7-37	–	PC3	ADC12_IN9, TIM1_CH4, SAI1_SD_A	LPTIM1_ETR, TIM1_CH4, SAI1_D1, TIM1_BKIN2, QUADSPI1_BK2_IO2, SAI1_SD_A, ADC1_IN9, ADC2_IN9, ADC3_EXTI3, ADC4_EXTI3, ADC5_EXTI3, OPAMP5_VINP, OPAMP5_VINP_SEC	No (3.3v only)	Morpho only: ADC12_IN9, TIM1_CH4 and OPAMP5 input; 3.3v only.
CN7-38	A5	PC0	ADC12_IN6, TIM1_CH1, LPUART1_RX	LPTIM1_IN1, TIM1_CH1, LPUART1_RX, ADC1_IN6, ADC2_IN6, COMP3_INM	Yes	A5 analog input (ADC12_IN6), TIM1_CH1 and LPUART1_RX; 5v tolerant as a digital pin.

Nucleo-G474RE Morpho CN10 Pins

On CN10, pin 1 is also at the STLINK-V3E end, but odd pins are on the inner column.

Pin	Label	GPIO	Main Functions	All Alternate Functions	5v Tolerant	Description
CN10-1	–	PC9	TIM3_CH4, HRTIM1_CHE2, I2C3_SDA	TIM3_CH4, HRTIM1_CHE2, TIM8_CH4, I2S_CKIN, TIM8_BKIN2, I2C3_SDA, DAC1_EXTI9, DAC2_EXTI9, DAC3_EXTI9, DAC4_EXTI9	Yes	Morpho only: HRTIM1_CHE2, TIM3_CH4/TIM8_CH4 and I2C3_SDA.
CN10-2	–	PC8	TIM3_CH3, HRTIM1_CHE1, I2C3_SCL, COMP7_OUT	TIM3_CH3, HRTIM1_CHE1, TIM8_CH3, TIM20_CH3, COMP7_OUT, I2C3_SCL	Yes	Morpho only: HRTIM1_CHE1, TIM3_CH3/TIM8_CH3/TIM20_CH3 and I2C3_SCL.
CN10-3	D15	PB8	TIM4_CH3, TIM8_CH2, USART3_RX, I2C1_SCL, FDCAN1_RX, BOOT0, COMP1_OUT	TIM16_CH1, TIM4_CH3, SAI1_CK1, I2C1_SCL, USART3_RX, COMP1_OUT, FDCAN1_RX, TIM8_CH2, TIM1_BKIN, HRTIM1_EEV8, SAI1_MCLK_A	Yes	D15 and CN7-7: the default I2C1_SCL (Wire), FDCAN1_RX and TIM4_CH3; also the BOOT0 pin.
CN10-4	–	PC6	TIM3_CH1, HRTIM1_CHF1, I2C4_SCL, COMP6_OUT, I2S2_MCK	TIM3_CH1, HRTIM1_EEV10, TIM8_CH1, I2S2_MCK, COMP6_OUT, I2C4_SCL, HRTIM1_CHF1	Yes	Morpho only: HRTIM1_CHF1, TIM3_CH1/TIM8_CH1, I2C4_SCL and COMP6_OUT.
CN10-5	D14	PB9	TIM4_CH4, TIM8_CH3, USART3_TX, I2C1_SDA, FDCAN1_TX, COMP2_OUT, SAI1_FS_A	TIM17_CH1, TIM4_CH4, SAI1_D2, I2C1_SDA, IR_OUT, USART3_TX, COMP2_OUT, FDCAN1_TX, TIM8_CH3, TIM1_CH3N, HRTIM1_EEV5, SAI1_FS_A, DAC1_EXTI9, DAC2_EXTI9, DAC3_EXTI9, DAC4_EXTI9	Yes	D14: the default I2C1_SDA (Wire), FDCAN1_TX, USART3_TX and TIM4_CH4 PWM.
CN10-6	D0	PC5	ADC2_IN11, TIM1_CH4N, USART1_RX, WKUP5	TIM15_BKIN, SAI1_D3, TIM1_CH4N, USART1_RX, HRTIM1_EEV10, ADC2_IN11, OPAMP1_VINM, OPAMP1_VINM1, OPAMP1_VINM_SEC, OPAMP2_VINM, OPAMP2_VINM1, OPAMP2_VINM_SEC, SYS_WKUP5	No (3.3v only)	D0: USART1_RX (the default header serial RX), ADC2_IN11 and WKUP5; 3.3v only; also on CN10-6 and CN10-37.
CN10-7	VREFP	–	VREF+ (JP8)	–	–	MCU VREF+: 3.25v (or 2.5v) reference or VDD, set by JP8.
CN10-8	5V_CHGR	–	USB 5v	–	–	5v from a USB charger on CN1 (JP5 on 5V_CHGR).
CN10-9	GND	–	–	–	–	Ground.
CN10-10	NC	–	–	–	–	Not connected.
CN10-11	D13	PA5	ADC2_IN13, DAC1_OUT2, TIM2_CH1, SPI1_SCK, LED LD2	TIM2_CH1, TIM2_ETR, SPI1_SCK, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC2_IN13, COMP2_INM, DAC1_OUT2, OPAMP2_VINM, OPAMP2_VINM0, OPAMP2_VINM_SEC	No (3.3v only)	D13: drives the green user LED LD2 (SB6), SPI1_SCK, DAC1_OUT2 and TIM2_CH1; 3.3v only.
CN10-12	–	PA12	TIM4_CH2, TIM16_CH1, USART1_RTS, FDCAN1_TX, USB_DP, COMP2_OUT	TIM16_CH1, I2S_CKIN, TIM1_CH2N, USART1_DE, USART1_RTS, COMP2_OUT, FDCAN1_TX, TIM4_CH2, TIM1_ETR, HRTIM1_FLT1, USB_DP	Yes	Morpho only: USB_DP, FDCAN1_TX and TIM4_CH2/TIM16_CH1 PWM.
CN10-13	D12	PA6	ADC2_IN3, DAC2_OUT1, TIM3_CH1, TIM16_CH1, LPUART1_CTS, SPI1_MISO, COMP1_OUT, QSPI_IO3	TIM16_CH1, TIM3_CH1, TIM8_BKIN, SPI1_MISO, TIM1_BKIN, COMP1_OUT, QUADSPI1_BK1_IO3, LPUART1_CTS, ADC2_IN3, DAC2_OUT1, OPAMP2_VOUT	No (3.3v only)	D12: SPI1_MISO, DAC2_OUT1, OPAMP2 output and TIM3_CH1/TIM16_CH1 PWM; 3.3v only.
CN10-14	–	PA11	TIM1_CH4, HRTIM1_CHB2, USART1_CTS, SPI2_MOSI, FDCAN1_RX, USB_DM, COMP1_OUT, I2S2_SD	I2S2_SD, SPI2_MOSI, TIM1_CH1N, USART1_CTS, USART1_NSS, COMP1_OUT, FDCAN1_RX, TIM4_CH1, TIM1_CH4, TIM1_BKIN2, HRTIM1_CHB2, ADC1_EXTI11, ADC2_EXTI11, USB_DM	Yes	Morpho only: USB_DM, FDCAN1_RX, HRTIM1_CHB2 and TIM1_CH4.
CN10-15	D11	PA7	ADC2_IN4, TIM3_CH2, TIM17_CH1, SPI1_MOSI, COMP2_OUT, QSPI_IO2	TIM17_CH1, TIM3_CH2, TIM8_CH1N, SPI1_MOSI, TIM1_CH1N, COMP2_OUT, QUADSPI1_BK1_IO2, UCPD1_FRSTX1, UCPD1_FRSTX2, ADC2_IN4, COMP2_INP, OPAMP1_VINP, OPAMP1_VINP_SEC, OPAMP2_VINP, OPAMP2_VINP_SEC	No (3.3v only)	D11: SPI1_MOSI, ADC2_IN4, COMP2 input and TIM3_CH2/TIM17_CH1 PWM; 3.3v only.
CN10-16	–	PB12	ADC1_IN11, ADC4_IN3, HRTIM1_CHC1, LPUART1_RTS, USART3_CK, SPI2_NSS, I2C2_SMBA, FDCAN2_RX, I2S2_WS	TIM5_ETR, I2C2_SMBA, I2S2_WS, SPI2_NSS, TIM1_BKIN, USART3_CK, LPUART1_DE, LPUART1_RTS, FDCAN2_RX, HRTIM1_CHC1, ADC1_IN11, ADC4_IN3, COMP7_INM, OPAMP4_VOUT, OPAMP6_VINP, OPAMP6_VINP_SEC	No (3.3v only)	Morpho only: HRTIM1_CHC1, SPI2_NSS, FDCAN2_RX and OPAMP4 output; 3.3v only.
CN10-17	D10	PB6	TIM4_CH1, TIM8_CH1, USART1_TX, FDCAN2_TX, COMP4_OUT, SAI1_FS_B	TIM16_CH1N, TIM4_CH1, TIM8_CH1, TIM8_ETR, USART1_TX, COMP4_OUT, FDCAN2_TX, TIM8_BKIN2, LPTIM1_ETR, HRTIM1_SCIN, HRTIM1_EEV4, SAI1_FS_B, UCPD1_CC1	Yes	D10: UCPD1_CC1, USART1_TX, FDCAN2_TX and TIM4_CH1/TIM8_CH1 PWM.
CN10-18	–	PB11	ADC12_IN14, OPAMP6_VOUT, TIM2_CH4, USART3_RX, LPUART1_TX, QSPI_NCS	TIM2_CH4, USART3_RX, LPUART1_TX, QUADSPI1_BK1_NCS, HRTIM1_FLT4, ADC1_EXTI11, ADC1_IN14, ADC2_EXTI11, ADC2_IN14, COMP6_INP, OPAMP4_VINP, OPAMP4_VINP_SEC, OPAMP6_VOUT	No (3.3v only)	Morpho only: ADC12_IN14, OPAMP6 output, USART3_RX and TIM2_CH4; 3.3v only.
CN10-19	D9	PC7	TIM3_CH2, HRTIM1_CHF2, I2C4_SDA, COMP5_OUT, I2S3_MCK	TIM3_CH2, HRTIM1_FLT5, TIM8_CH2, I2S3_MCK, COMP5_OUT, I2C4_SDA, HRTIM1_CHF2	Yes	D9: HRTIM1_CHF2, TIM3_CH2/TIM8_CH2, I2C4_SDA and COMP5_OUT.
CN10-20	GND	–	–	–	–	Ground.
CN10-21	D8	PA9	ADC5_IN2, TIM1_CH2, HRTIM1_CHA2, USART1_TX, I2C2_SCL, I2C3_SMBA, COMP5_OUT, SAI1_FS_A	I2C3_SMBA, I2C2_SCL, I2S3_MCK, TIM1_CH2, USART1_TX, COMP5_OUT, TIM15_BKIN, TIM2_CH3, HRTIM1_CHA2, SAI1_FS_A, ADC5_IN2, DAC1_EXTI9, DAC2_EXTI9, DAC3_EXTI9, DAC4_EXTI9, UCPD1_DBCC1	Yes	D8: HRTIM1_CHA2, TIM1_CH2 and USART1_TX; driving it HIGH enables the UCPD dead-battery pull-down on PB6.
CN10-22	–	PB2	ADC2_IN12, TIM20_CH1, TIM5_CH1, I2C3_SMBA	RTC_OUT2, LPTIM1_OUT, TIM5_CH1, TIM20_CH1, I2C3_SMBA, QUADSPI1_BK2_IO1, HRTIM1_SCIN, ADC2_IN12, ADC3_EXTI2, ADC4_EXTI2, ADC5_EXTI2, COMP4_INM, OPAMP3_VINM, OPAMP3_VINM0, OPAMP3_VINM_SEC	No (3.3v only)	Morpho only: ADC2_IN12, TIM20_CH1/TIM5_CH1 and OPAMP3 input; 3.3v only.
CN10-23	D7	PA8	ADC5_IN1, OPAMP5_VOUT, TIM1_CH1, HRTIM1_CHA1, USART1_CK, I2C2_SDA, I2C3_SCL, FDCAN3_RX, MCO, COMP7_OUT	RCC_MCO, I2C3_SCL, I2C2_SDA, I2S2_MCK, TIM1_CH1, USART1_CK, COMP7_OUT, TIM4_ETR, FDCAN3_RX, SAI1_CK2, HRTIM1_CHA1, SAI1_SCK_A, ADC5_IN1, OPAMP5_VOUT	Yes	D7: HRTIM1_CHA1, TIM1_CH1, OPAMP5 output, FDCAN3_RX and the MCO clock output.
CN10-24	–	PB1	ADC1_IN12, ADC3_IN1, TIM3_CH4, TIM1_CH3N, LPUART1_RTS, COMP4_OUT, QSPI_IO0	TIM3_CH4, TIM8_CH3N, TIM1_CH3N, COMP4_OUT, QUADSPI1_BK1_IO0, LPUART1_DE, LPUART1_RTS, HRTIM1_SCOUT, ADC1_IN12, ADC3_IN1, COMP1_INP, OPAMP3_VOUT, OPAMP6_VINM, OPAMP6_VINM1, OPAMP6_VINM_SEC	No (3.3v only)	Morpho only: ADC1_IN12/ADC3_IN1, OPAMP3 output, COMP4_OUT and TIM3_CH4/TIM1_CH3N; 3.3v only.
CN10-25	D6	PB10	TIM2_CH3, USART3_TX, LPUART1_RX, SAI1_SCK_A	TIM2_CH3, USART3_TX, LPUART1_RX, QUADSPI1_CLK, TIM1_BKIN, HRTIM1_FLT3, SAI1_SCK_A, COMP5_INM, DAC1_EXTI10, DAC2_EXTI10, DAC3_EXTI10, DAC4_EXTI10, OPAMP3_VINM, OPAMP3_VINM1, OPAMP3_VINM_SEC, OPAMP4_VINM, OPAMP4_VINM0, OPAMP4_VINM_SEC	No (3.3v only)	D6: TIM2_CH3 PWM, USART3_TX, LPUART1_RX and HRTIM1_FLT3; 3.3v only.
CN10-26	–	PB15	ADC2_IN15, ADC4_IN5, TIM15_CH2, HRTIM1_CHD2, SPI2_MOSI, COMP3_OUT, I2S2_SD	RTC_REFIN, TIM15_CH2, TIM15_CH1N, COMP3_OUT, TIM1_CH3N, I2S2_SD, SPI2_MOSI, HRTIM1_CHD2, ADC1_EXTI15, ADC2_EXTI15, ADC2_IN15, ADC4_IN5, COMP6_INM, OPAMP5_VINM, OPAMP5_VINM0, OPAMP5_VINM_SEC	No (3.3v only)	Morpho only: HRTIM1_CHD2, TIM1_CH3N/TIM15_CH2 and SPI2_MOSI; 3.3v only.
CN10-27	D5	PB4	TIM3_CH1, TIM16_CH1, USART2_RX, UART5_RTS, SPI1_MISO, SPI3_MISO, FDCAN3_TX, NJTRST, SAI1_MCLK_B	SYS_JTRST, TIM16_CH1, TIM3_CH1, TIM8_CH2N, SPI1_MISO, SPI3_MISO, USART2_RX, UART5_DE, UART5_RTS, TIM17_BKIN, FDCAN3_TX, HRTIM1_EEV7, SAI1_MCLK_B, UCPD1_CC2	Yes	D5: NJTRST (pull-up) after reset and UCPD1_CC2, then SPI1/SPI3_MISO, TIM3_CH1 or FDCAN3_TX.
CN10-28	–	PB14	ADC1_IN5, ADC4_IN4, TIM15_CH1, HRTIM1_CHD1, USART3_RTS, SPI2_MISO, COMP4_OUT	TIM15_CH1, SPI2_MISO, TIM1_CH2N, USART3_DE, USART3_RTS, COMP4_OUT, HRTIM1_CHD1, ADC1_IN5, ADC4_IN4, COMP7_INP, OPAMP2_VINP, OPAMP2_VINP_SEC, OPAMP5_VINP, OPAMP5_VINP_SEC	No (3.3v only)	Morpho only: HRTIM1_CHD1, TIM1_CH2N/TIM15_CH1, SPI2_MISO and COMP7 input; 3.3v only.
CN10-29	D4	PB5	TIM3_CH2, TIM17_CH1, UART5_CTS, USART2_CK, SPI1_MOSI, SPI3_MOSI, I2C3_SDA, I2C1_SMBA, FDCAN2_RX, SAI1_SD_B, I2S3_SD	TIM16_BKIN, TIM3_CH2, TIM8_CH3N, I2C1_SMBA, SPI1_MOSI, I2S3_SD, SPI3_MOSI, USART2_CK, I2C3_SDA, FDCAN2_RX, TIM17_CH1, LPTIM1_IN1, SAI1_SD_B, HRTIM1_EEV6, UART5_CTS	Yes	D4: SPI1/SPI3_MOSI, I2C3_SDA, FDCAN2_RX and TIM3_CH2/TIM17_CH1 PWM.
CN10-30	–	PB13	ADC3_IN5, TIM1_CH1N, HRTIM1_CHC2, LPUART1_CTS, USART3_CTS, SPI2_SCK, FDCAN2_TX, I2S2_CK	I2S2_CK, SPI2_SCK, TIM1_CH1N, USART3_CTS, USART3_NSS, LPUART1_CTS, FDCAN2_TX, HRTIM1_CHC2, ADC3_IN5, COMP5_INP, OPAMP3_VINP, OPAMP3_VINP_SEC, OPAMP4_VINP, OPAMP4_VINP_SEC, OPAMP6_VINP, OPAMP6_VINP_SEC	No (3.3v only)	Morpho only: HRTIM1_CHC2, TIM1_CH1N, SPI2_SCK and FDCAN2_TX; 3.3v only.
CN10-31	D3	PB3	TIM2_CH2, TIM8_CH1N, USART2_TX, SPI1_SCK, SPI3_SCK, FDCAN3_RX, SWO, SAI1_SCK_B	SYS_JTDO-SWO, TIM2_CH2, TIM4_ETR, CRS_SYNC, TIM8_CH1N, SPI1_SCK, I2S3_CK, SPI3_SCK, USART2_TX, TIM3_ETR, FDCAN3_RX, HRTIM1_SCOUT, HRTIM1_EEV9, SAI1_SCK_B, ADC3_EXTI3, ADC4_EXTI3, ADC5_EXTI3	Yes	D3: SWO trace output to the STLINK-V3E (SB15), then SPI1/SPI3_SCK, TIM2_CH2 or FDCAN3_RX.
CN10-32	AGND	–	–	–	–	Analog ground.
CN10-33	D2	PA10	TIM1_CH3, HRTIM1_CHB1, USART1_RX, SPI2_MISO, I2C2_SMBA, PVD_IN, COMP6_OUT	TIM17_BKIN, CRS_SYNC, I2C2_SMBA, SPI2_MISO, TIM1_CH3, USART1_RX, COMP6_OUT, TIM2_CH4, TIM8_BKIN, SAI1_D1, HRTIM1_CHB1, SAI1_SD_A, DAC1_EXTI10, DAC2_EXTI10, DAC3_EXTI10, DAC4_EXTI10, SYS_PVD_IN, UCPD1_DBCC2	Yes	D2: HRTIM1_CHB1, TIM1_CH3 and USART1_RX; driving it HIGH enables the UCPD dead-battery pull-down on PB4.
CN10-34	D1	PC4	ADC2_IN5, USART1_TX, I2C2_SCL	TIM1_ETR, I2C2_SCL, USART1_TX, QUADSPI1_BK2_IO3, ADC2_IN5	Yes	D1: USART1_TX (the default header serial TX), I2C2_SCL and ADC2_IN5; also on CN10-34 and CN10-35.
CN10-35	D1	PC4	ADC2_IN5, USART1_TX, I2C2_SCL	TIM1_ETR, I2C2_SCL, USART1_TX, QUADSPI1_BK2_IO3, ADC2_IN5	Yes	D1: USART1_TX (the default header serial TX), I2C2_SCL and ADC2_IN5; also on CN10-34 and CN10-35.
CN10-36	NC	–	–	–	–	Not connected.
CN10-37	D0	PC5	ADC2_IN11, TIM1_CH4N, USART1_RX, WKUP5	TIM15_BKIN, SAI1_D3, TIM1_CH4N, USART1_RX, HRTIM1_EEV10, ADC2_IN11, OPAMP1_VINM, OPAMP1_VINM1, OPAMP1_VINM_SEC, OPAMP2_VINM, OPAMP2_VINM1, OPAMP2_VINM_SEC, SYS_WKUP5	No (3.3v only)	D0: USART1_RX (the default header serial RX), ADC2_IN11 and WKUP5; 3.3v only; also on CN10-6 and CN10-37.
CN10-38	NC	–	–	–	–	Not connected.

CN10-18 is PB11, a real I/O on the G474RE (it was not connected on the F4 Nucleo-64 boards). PC14, PC15, PF0 and PF1 are listed on CN7 but are disconnected by default because the crystals use them.

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Wrap Up

To conclude this guide article, the Nucleo-G474RE is a very solid development board for digital power, motor control, and analog-heavy projects. It gives you a 170MHz Cortex-M4F with HRTIM, 5 ADCs, op-amps, comparators, and CAN FD, on a board that you can program out of the box. Just remember the board-level gotchas: the VCP is LPUART1, D0/D1 are USART1, D15 is BOOT0, B1 reads HIGH, and many pins are 3.3v-only.

We hope it’s been a helpful guide to help you decide which pins to use for your project. For more boards, check out the Pinouts, Datasheets & Schematic Diagrams Library. Follow this STM32 Series of Tutorials to learn more about programming STM32 microcontrollers.

If you’re just getting started with STM32, you need to check out the STM32 Getting Started Ultimate Guide below.