Source: ST
DS10693 Rev 10(STM32F446xC/E datasheet) andUM1724 Rev 16(Nucleo user manual). 64-pin LQFP64 package, pin 1 at the top-left corner, numbered counter-clockwise.
Alternate functions are selected through the GPIOx_AFR registers; additional functions are enabled directly through peripheral registers (ADC, DAC, oscillator, wake-up, …). Arduino and Morpho columns give the Nucleo-F446RE header pin names. Peripheral bus speeds are in docs/public/pinout/buses.json.
| # | Pin | Type | Default function | Alternate functions | Additional functions | Arduino | Morpho | Datasheet notes |
|---|---|---|---|---|---|---|---|---|
| 1 | VBAT | Power | Backup power supply | — | — | — | CN7-33 | Keeps RTC, backup registers and PC13-PC15 alive when VDD is off; tie to VDD if no backup battery. |
| 2 | PC13 | I/O · FT · 5V-tolerant I/O | GPIO | EVENTOUT | TAMP_1/WKUP1 | — | CN7-23 | max 2 MHz (30 pF max) Backup-domain pin (fed through the VBAT power switch): sinks or sources 3 mA max; as an output, ≤ 2 MHz with ≤ 30 pF load (DS10693 §6.3.17). Keep for slow signals. WKUP1 / RTC tamper: can wake the MCU from Standby. Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 3 | PC14-OSC32_IN | I/O · FT · 5V-tolerant I/O | GPIO | EVENTOUT | OSC32_IN | — | CN7-25 | max 2 MHz (30 pF max) Backup-domain pin (fed through the VBAT power switch): sinks or sources 3 mA max; as an output, ≤ 2 MHz with ≤ 30 pF load (DS10693 §6.3.17). Keep for slow signals. LSE 32.768 kHz crystal pin: only a GPIO when the LSE is unused. Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 4 | PC15-OSC32_OUT | I/O · FT · 5V-tolerant I/O | GPIO | EVENTOUT | OSC32_OUT | — | CN7-27 | max 2 MHz (30 pF max) Backup-domain pin (fed through the VBAT power switch): sinks or sources 3 mA max; as an output, ≤ 2 MHz with ≤ 30 pF load (DS10693 §6.3.17). Keep for slow signals. LSE 32.768 kHz crystal pin: only a GPIO when the LSE is unused. |
| 5 | PH0-OSC_IN | I/O · FT · 5V-tolerant I/O | GPIO | EVENTOUT | OSC_IN | — | CN7-29 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) HSE 4-26 MHz crystal / clock pin: only a GPIO when the HSE is unused. USB needs HSE for an accurate 48 MHz. Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 6 | PH1-OSC_OUT | I/O · FT · 5V-tolerant I/O | GPIO | EVENTOUT | OSC_OUT | — | CN7-31 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) HSE 4-26 MHz crystal / clock pin: only a GPIO when the HSE is unused. USB needs HSE for an accurate 48 MHz. Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 7 | NRST | Reset | System reset (weak pull-up) | — | — | RESET (Reset) | CN7-14 | Bidirectional reset with weak pull-up. Tolerates no negative current injection (DS10693 Table 55). |
| 8 | PC0 | I/O · FT · 5V-tolerant I/O | GPIO | SAI1_MCLK_B, OTG_HS_ULPI_STP, FMC_SDNWE, EVENTOUT | ADC123_IN10 | A5 (ADC123_IN10) | CN7-38 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 9 | PC1 | I/O · FT · 5V-tolerant I/O | GPIO | SPI3_MOSI/I2S3_SD, SAI1_SD_A, SPI2_MOSI/I2S2_SD, EVENTOUT | ADC123_IN11 | A4 (ADC123_IN11) | CN7-36 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 10 | PC2 | I/O · FT · 5V-tolerant I/O | GPIO | SPI2_MISO, OTG_HS_ULPI_DIR, FMC_SDNE0, EVENTOUT | ADC123_IN12 | — | CN7-35 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 11 | PC3 | I/O · FT · 5V-tolerant I/O | GPIO | SPI2_MOSI/I2S2_SD, OTG_HS_ULPI_NXT, FMC_SDCKE0, EVENTOUT | ADC123_IN13 | — | CN7-37 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 12 | VSSA | Power | Analog ground | — | — | — | — | — |
| 13 | VDDA | Power | Analog supply | — | — | — | — | Analog supply for ADC/DAC/PLLs: tie to VDD with its own decoupling. |
| 14 | PA0-WKUP | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH1/TIM2_ETR, TIM5_CH1, TIM8_ETR, USART2_CTS, UART4_TX, EVENTOUT | ADC123_IN0, WKUP0/TAMP_2 | A0 (ADC123_IN0) | CN7-28 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) WKUP0: can wake the MCU from Standby. |
| 15 | PA1 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH2, TIM5_CH2, USART2_RTS, UART4_RX, QUADSPI_BK1_IO3, SAI2_MCLK_B, EVENTOUT | ADC123_IN1 | A1 (ADC123_IN1) | CN7-30 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 16 | PA2 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH3, TIM5_CH3, TIM9_CH1, USART2_TX, SAI2_SCK_B, EVENTOUT | ADC123_IN2 | D1 (USART2_TX) | CN10-35 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 17 | PA3 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH4, TIM5_CH4, TIM9_CH2, SAI1_FS_A, USART2_RX, OTG_HS_ULPI_D0, EVENTOUT | ADC123_IN3 | D0 (USART2_RX) | CN10-37 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 18 | VSS | Power | Ground | — | — | — | — | — |
| 19 | VDD | Power | Digital supply | — | — | — | — | — |
| 20 | PA4 | I/O · TTa · ADC I/O | GPIO | SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, USART2_CK, OTG_HS_SOF, DCMI_HSYNC, EVENTOUT | ADC12_IN4, DAC_OUT1 | A2 (ADC12_IN4) | CN7-32 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) TTa: 3.3 V tolerant only (not 5 V tolerant), wired straight to the ADC/DAC. |
| 21 | PA5 | I/O · TTa · ADC I/O | GPIO | TIM2_CH1/TIM2_ETR, TIM8_CH1N, SPI1_SCK/I2S1_CK, OTG_HS_ULPI_CK, EVENTOUT | ADC12_IN5, DAC_OUT2 | D13 (SPI1_SCK) | CN10-11 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) TTa: 3.3 V tolerant only (not 5 V tolerant), wired straight to the ADC/DAC. |
| 22 | PA6 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_BKIN, TIM3_CH1, TIM8_BKIN, SPI1_MISO, I2S2_MCK, TIM13_CH1, DCMI_PIXCLK, EVENTOUT | ADC12_IN6 | D12 (SPI1_MISO) | CN10-13 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 23 | PA7 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH1N, TIM3_CH2, TIM8_CH1N, SPI1_MOSI/I2S1_SD, TIM14_CH1, FMC_SDNWE, EVENTOUT | ADC12_IN7 | D11 (TIM14_CH1 / SPI1_MOSI) | CN10-15 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 24 | PC4 | I/O · FT · 5V-tolerant I/O | GPIO | I2S1_MCK, SPDIFRX_IN2, FMC_SDNE0, EVENTOUT | ADC12_IN14 | — | CN10-34 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 25 | PC5 | I/O · FT · 5V-tolerant I/O | GPIO | USART3_RX, SPDIFRX_IN3, FMC_SDCKE0, EVENTOUT | ADC12_IN15 | — | CN10-6 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 26 | PB0 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH2N, TIM3_CH3, TIM8_CH2N, SPI3_MOSI/I2S3_SD, UART4_CTS, OTG_HS_ULPI_D1, SDIO_D1, EVENTOUT | ADC12_IN8 | A3 (ADC12_IN8) | CN7-34 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 27 | PB1 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH3N, TIM3_CH4, TIM8_CH3N, OTG_HS_ULPI_D2, SDIO_D2, EVENTOUT | ADC12_IN9 | — | CN10-24 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 28 | PB2-BOOT1 | I/O · FT · 5V-tolerant I/O | BOOT1 | TIM2_CH4, SAI1_SD_A, SPI3_MOSI/I2S3_SD, QUADSPI_CLK, OTG_HS_ULPI_D4, SDIO_CK, EVENTOUT | — | — | CN10-22 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) BOOT1 strap: only sampled at reset when BOOT0 = 1. |
| 29 | PB10 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH3, I2C2_SCL, SPI2_SCK/I2S2_CK, SAI1_SCK_A, USART3_TX, OTG_HS_ULPI_D3, EVENTOUT | — | D6 (TIM2_CH3) | CN10-25 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 30 | VCAP_1 | Power | Regulator capacitor | — | — | — | — | External ceramic capacitor to ground for the 1.2 V regulator (DS10693 Table 18). |
| 31 | VSS | Power | Ground | — | — | — | — | — |
| 32 | VDD | Power | Digital supply | — | — | — | — | — |
| 33 | PB12 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_BKIN, I2C2_SMBA, SPI2_NSS/I2S2_WS, SAI1_SCK_B, USART3_CK, CAN2_RX, OTG_HS_ULPI_D5, OTG_HS_ID, EVENTOUT | — | — | CN10-16 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 34 | PB13 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH1N, SPI2_SCK/I2S2_CK, USART3_CTS, CAN2_TX, OTG_HS_ULPI_D6, EVENTOUT | OTG_HS_VBUS | — | CN10-30 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 35 | PB14 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH2N, TIM8_CH2N, SPI2_MISO, USART3_RTS, TIM12_CH1, OTG_HS_DM, EVENTOUT | — | — | CN10-28 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Supplied by VDDUSB, which is bonded to VDD on this package (VDDUSB pin only on WLCSP81/UFBGA144/LQFP144). |
| 36 | PB15 | I/O · FT · 5V-tolerant I/O | GPIO | RTC_REFIN, TIM1_CH3N, TIM8_CH3N, SPI2_MOSI/I2S2_SD, TIM12_CH2, OTG_HS_DP, EVENTOUT | — | — | CN10-26 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Supplied by VDDUSB, which is bonded to VDD on this package (VDDUSB pin only on WLCSP81/UFBGA144/LQFP144). |
| 37 | PC6 | I/O · FTf · 5V-tolerant I/O (FM+) | GPIO | TIM3_CH1, TIM8_CH1, FMPI2C1_SCL, I2S2_MCK, USART6_TX, SDIO_D6, DCMI_D0, EVENTOUT | — | — | CN10-4 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) FTf: 5 V tolerant, I2C Fast-mode Plus (1 MHz) capable. |
| 38 | PC7 | I/O · FTf · 5V-tolerant I/O (FM+) | GPIO | TIM3_CH2, TIM8_CH2, FMPI2C1_SDA, SPI2_SCK/I2S2_CK, I2S3_MCK, SPDIFRX_IN1, USART6_RX, SDIO_D7, DCMI_D1, EVENTOUT | — | D9 (TIM8_CH2) | CN10-19 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) FTf: 5 V tolerant, I2C Fast-mode Plus (1 MHz) capable. |
| 39 | PC8 | I/O · FT · 5V-tolerant I/O | GPIO | TRACED0, TIM3_CH3, TIM8_CH3, UART5_RTS, USART6_CK, SDIO_D0, DCMI_D2, EVENTOUT | — | — | CN10-2 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 40 | PC9 | I/O · FT · 5V-tolerant I/O | GPIO | MCO2, TIM3_CH4, TIM8_CH4, I2C3_SDA, I2S_CKIN, UART5_CTS, QUADSPI_BK1_IO0, SDIO_D1, DCMI_D3, EVENTOUT | — | — | CN10-1 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 41 | PA8 | I/O · FT · 5V-tolerant I/O | GPIO | MCO1, TIM1_CH1, I2C3_SCL, USART1_CK, OTG_FS_SOF, EVENTOUT | — | D7 (GPIO) | CN10-23 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 42 | PA9 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH2, I2C3_SMBA, SPI2_SCK/I2S2_CK, SAI1_SD_B, USART1_TX, DCMI_D0, EVENTOUT | OTG_FS_VBUS | D8 (GPIO) | CN10-21 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 43 | PA10 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH3, USART1_RX, OTG_FS_ID, DCMI_D1, EVENTOUT | — | D2 (GPIO) | CN10-33 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 44 | PA11 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_CH4, USART1_CTS, CAN1_RX, OTG_FS_DM, EVENTOUT | — | — | CN10-14 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Supplied by VDDUSB, which is bonded to VDD on this package (VDDUSB pin only on WLCSP81/UFBGA144/LQFP144). |
| 45 | PA12 | I/O · FT · 5V-tolerant I/O | GPIO | TIM1_ETR, USART1_RTS, SAI2_FS_B, CAN1_TX, OTG_FS_DP, EVENTOUT | — | — | CN10-12 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Supplied by VDDUSB, which is bonded to VDD on this package (VDDUSB pin only on WLCSP81/UFBGA144/LQFP144). |
| 46 | PA13 (JTMS-SWDIO) | I/O · FT · 5V-tolerant I/O | SWD data (JTMS-SWDIO) | JTMS-SWDIO, EVENTOUT | — | — | CN7-13 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) SWD after reset: using it as a GPIO disables debugging (recover with connect-under-reset). |
| 47 | VSS | Power | Ground | — | — | — | — | — |
| 48 | VDD | Power | Digital supply | — | — | — | — | — |
| 49 | PA14 (JTCK-SWCLK) | I/O · FT · 5V-tolerant I/O | SWD clock (JTCK-SWCLK) | JTCK-SWCLK, EVENTOUT | — | — | CN7-15 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) SWD after reset: using it as a GPIO disables debugging (recover with connect-under-reset). |
| 50 | PA15 (JTDI) | I/O · FT · 5V-tolerant I/O | JTDI | JTDI, TIM2_CH1/TIM2_ETR, HDMI_CEC, SPI1_NSS/I2S1_WS, SPI3_NSS/I2S3_WS, UART4_RTS, EVENTOUT | — | — | CN7-17 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) JTAG function after reset: free once the debug port is set to SWD only (PB3 keeps SWO trace). |
| 51 | PC10 | I/O · FT · 5V-tolerant I/O | GPIO | SPI3_SCK/I2S3_CK, USART3_TX, UART4_TX, QUADSPI_BK1_IO1, SDIO_D2, DCMI_D8, EVENTOUT | — | — | CN7-1 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 52 | PC11 | I/O · FT · 5V-tolerant I/O | GPIO | SPI3_MISO, USART3_RX, UART4_RX, QUADSPI_BK2_NCS, SDIO_D3, DCMI_D4, EVENTOUT | — | — | CN7-2 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 53 | PC12 | I/O · FT · 5V-tolerant I/O | GPIO | I2C2_SDA, SPI3_MOSI/I2S3_SD, USART3_CK, UART5_TX, SDIO_CK, DCMI_D9, EVENTOUT | — | — | CN7-3 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 54 | PD2 | I/O · FT · 5V-tolerant I/O | GPIO | TIM3_ETR, UART5_RX, SDIO_CMD, DCMI_D11, EVENTOUT | — | — | CN7-4 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) |
| 55 | PB3 (JTDO/TRACESWO) | I/O · FT · 5V-tolerant I/O | JTDO/TRACESWO | JTDO/TRACESWO, TIM2_CH2, I2C2_SDA, SPI1_SCK/I2S1_CK, SPI3_SCK/I2S3_CK, EVENTOUT | — | D3 (TIM2_CH2) | CN10-31 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) JTAG function after reset: free once the debug port is set to SWD only (PB3 keeps SWO trace). Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 56 | PB4 (NJTRST) | I/O · FT · 5V-tolerant I/O | NJTRST | NJTRST, TIM3_CH1, I2C3_SDA, SPI1_MISO, SPI3_MISO, SPI2_NSS/I2S2_WS, EVENTOUT | — | D5 (TIM3_CH1) | CN10-27 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) JTAG function after reset: free once the debug port is set to SWD only (PB3 keeps SWO trace). Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 57 | PB5 | I/O · FT · 5V-tolerant I/O | GPIO | TIM3_CH2, I2C1_SMBA, SPI1_MOSI/I2S1_SD, SPI3_MOSI/I2S3_SD, CAN2_RX, OTG_HS_ULPI_D7, FMC_SDCKE1, DCMI_D10, EVENTOUT | — | D4 (GPIO) | CN10-29 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 58 | PB6 | I/O · FT · 5V-tolerant I/O | GPIO | TIM4_CH1, HDMI_CEC, I2C1_SCL, USART1_TX, CAN2_TX, QUADSPI_BK1_NCS, FMC_SDNE1, DCMI_D5, EVENTOUT | — | D10 (TIM4_CH1 / SPI1_CS) | CN10-17 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 59 | PB7 | I/O · FT · 5V-tolerant I/O | GPIO | TIM4_CH2, I2C1_SDA, USART1_RX, SPDIFRX_IN0, FMC_NL, DCMI_VSYNC, EVENTOUT | — | — | CN7-21 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 60 | BOOT0 | Boot | Boot configuration | — | VPP | — | CN7-7 | Dedicated boot pin: pull low to boot from Flash. Tolerates no negative current injection (DS10693 Table 55). |
| 61 | PB8 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH1/TIM2_ETR, TIM4_CH3, TIM10_CH1, I2C1_SCL, CAN1_RX, SDIO_D4, DCMI_D6, EVENTOUT | — | D15 (I2C1_SCL) A5 (alt) (I2C1_SCL) | CN10-3 CN7-38 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 62 | PB9 | I/O · FT · 5V-tolerant I/O | GPIO | TIM2_CH2, TIM4_CH4, TIM11_CH1, I2C1_SDA, SPI2_NSS/I2S2_WS, SAI1_FS_B, CAN1_TX, SDIO_D5, DCMI_D7, EVENTOUT | — | D14 (I2C1_SDA) A4 (alt) (I2C1_SDA) | CN10-5 CN7-36 | max 100 MHz (OSPEEDR=11, 30 pF, VDD ≥ 2.7 V) Tolerates no negative current injection (0 mA, DS10693 Table 55): a signal below VSS can disturb it. Keep it away from long or noisy lines. |
| 63 | VSS | Power | Ground | — | — | — | — | — |
| 64 | VDD | Power | Digital supply | — | — | — | — | — |