
Pocket multi-tool for hardware exploration with sub-GHz radio, NFC, RFID, infrared, iButton, Bluetooth LE, USB-C, microSD, and an 18-pin 2.54 mm GPIO expansion header.
External module power; USB-fed when connected, battery output must be enabled in GPIO menu; up to 1.2 A fused
EXTI7, TIM1.1N/TIM17.1, ADC1.12, COMP2_OUT, I2C3.SCL, SPI1.MOSI
EXTI6, TIM1.BKIN/TIM16.1, ADC1.11, LPUART1.CTS, SPI1.MISO
EXTI4, LPTIM2.OUT, ADC1.9, COMP1_IN-/COMP2_IN-, SPI1.CS
EXTI3, TIM2.2, COMP2_IN-, USART1.DE/RTS, SPI1.SCK, SWO
EXTI2, LPTIM1.OUT, COMP1_IN+, I2C3.SMBA, SPI1.CS
EXTI3, LPTIM1.ETR/LPTIM2.ETR, ADC1.4
Common ground reference
External module power, enabled by default; up to 1.2 A, temporarily disabled during firmware updates and microSD mounting
SWD clock, EXTI14, LPTIM1.OUT
Common ground reference
SWD data I/O, EXTI13
USART1 transmit, LPTIM1.ETR, COMP2_IN+, MCO
USART1 receive, EXTI7, LPTIM1.IN2/TIM1.BKIN, COMP2_IN-
I2C3.SDA, LPUART1.TX, ADC1.2, LPTIM1.OUT, EXTI1; shared with Sub-GHz
I2C3.SCL, LPUART1.RX, ADC1.1, LPTIM1.IN1/LPTIM2.IN1, EXTI0
iButton one-wire, I2C3.SDA with 5 V pull-up, EXTI14, TIM1.2N
Common ground reference
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| 5V | 1 | Power | External module power; USB-fed when connected, battery output must be enabled in GPIO menu; up to 1.2 A fused | +5 V |
| PA7 | 2 | GPIO | EXTI7, TIM1.1N/TIM17.1, ADC1.12, COMP2_OUT, I2C3.SCL, SPI1.MOSI | 3.3 V logic |
| PA6 | 3 | GPIO | EXTI6, TIM1.BKIN/TIM16.1, ADC1.11, LPUART1.CTS, SPI1.MISO | 3.3 V logic |
| PA4 | 4 | GPIO | EXTI4, LPTIM2.OUT, ADC1.9, COMP1_IN-/COMP2_IN-, SPI1.CS | 3.3 V logic |
| PB3 | 5 | GPIO | EXTI3, TIM2.2, COMP2_IN-, USART1.DE/RTS, SPI1.SCK, SWO | 3.3 V logic |
| PB2 | 6 | GPIO | EXTI2, LPTIM1.OUT, COMP1_IN+, I2C3.SMBA, SPI1.CS | 3.3 V logic |
| PC3 | 7 | GPIO | EXTI3, LPTIM1.ETR/LPTIM2.ETR, ADC1.4 | 3.3 V logic |
| GND | 8 | Ground | Common ground reference | |
| 3.3V | 9 | Power | External module power, enabled by default; up to 1.2 A, temporarily disabled during firmware updates and microSD mounting | +3.3 V |
| PA14SWCLK | 10 | Unknown | SWD clock, EXTI14, LPTIM1.OUT | 3.3 V logic |
| GND | 11 | Ground | Common ground reference | |
| PA13SWDIO | 12 | Unknown | SWD data I/O, EXTI13 | 3.3 V logic |
| PB6USART1.TX | 13 | UART | USART1 transmit, LPTIM1.ETR, COMP2_IN+, MCO | 3.3 V logic |
| PB7USART1.RX | 14 | UART | USART1 receive, EXTI7, LPTIM1.IN2/TIM1.BKIN, COMP2_IN- | 3.3 V logic |
| PC1I2C3.SDA | 15 | GPIO | I2C3.SDA, LPUART1.TX, ADC1.2, LPTIM1.OUT, EXTI1; shared with Sub-GHz | 3.3 V logic |
| PC0I2C3.SCL | 16 | GPIO | I2C3.SCL, LPUART1.RX, ADC1.1, LPTIM1.IN1/LPTIM2.IN1, EXTI0 | 3.3 V logic |
| PB14iButton | 17 | Unknown | iButton one-wire, I2C3.SDA with 5 V pull-up, EXTI14, TIM1.2N | 5 V pull-up |
| GND | 18 | Ground | Common ground reference |
External module power; USB-fed when connected, battery output must be enabled in GPIO menu; up to 1.2 A fused
EXTI7, TIM1.1N/TIM17.1, ADC1.12, COMP2_OUT, I2C3.SCL, SPI1.MOSI
EXTI6, TIM1.BKIN/TIM16.1, ADC1.11, LPUART1.CTS, SPI1.MISO
EXTI4, LPTIM2.OUT, ADC1.9, COMP1_IN-/COMP2_IN-, SPI1.CS
EXTI3, TIM2.2, COMP2_IN-, USART1.DE/RTS, SPI1.SCK, SWO
EXTI2, LPTIM1.OUT, COMP1_IN+, I2C3.SMBA, SPI1.CS
EXTI3, LPTIM1.ETR/LPTIM2.ETR, ADC1.4
Common ground reference
External module power, enabled by default; up to 1.2 A, temporarily disabled during firmware updates and microSD mounting
SWD clock, EXTI14, LPTIM1.OUT
Common ground reference
SWD data I/O, EXTI13
USART1 transmit, LPTIM1.ETR, COMP2_IN+, MCO
USART1 receive, EXTI7, LPTIM1.IN2/TIM1.BKIN, COMP2_IN-
I2C3.SDA, LPUART1.TX, ADC1.2, LPTIM1.OUT, EXTI1; shared with Sub-GHz
I2C3.SCL, LPUART1.RX, ADC1.1, LPTIM1.IN1/LPTIM2.IN1, EXTI0
iButton one-wire, I2C3.SDA with 5 V pull-up, EXTI14, TIM1.2N
Common ground reference
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