MapleMini F103CB

Below are the pins usable for the peripherals. Pins in bold are the default.

SPI

Instance MOSI MISO SCK
SPI1 4 (PA7), 17 (PB5) 5 (PA6), 18 (PB4) 6 (PA5), 19 (PB3)
SPI2 28 (PB15) 29 (PB14) 30 (PB13)

I2C

Instance SDA SCL
I2C1 15 (PB7), 34 (PB9) 16 (PB6), 32 (PB8)
I2C2 0 (PB11) 1 (PB10)

USART

Instance RX TX
USART1 25 (PA10), 15 (PB7) 26 (PA9), 16 (PB6)
USART2 8 (PA3) 9 (PA2)
USART3 0 (PB11) 1 (PB10)

TIM

Instance CH1 CH2 CH3 CH4
TIM1 27 (PA8), 4 (PA7), 30 (PB13) 26 (PA9), 3 (PB0), 29 (PB14) 25 (PA10), 33 (PB1), 28 (PB15) 24 (PA11)
TIM2 11 (PA0), 20 (PA15) 10 (PA1), 19 (PB3) 9 (PA2), 1 (PB10) 8 (PA3), 0 (PB11)
TIM3 5 (PA6), 18 (PB4) 4 (PA7), 17 (PB5) 3 (PB0) 33 (PB1)
TIM4 16 (PB6) 15 (PB7) 32 (PB8) 34 (PB9)

ADC

Instance Channel Pin
ADC1 IN0 11 (PA0)
ADC1 IN1 10 (PA1)
ADC1 IN2 9 (PA2)
ADC1 IN3 8 (PA3)
ADC1 IN4 7 (PA4)
ADC1 IN5 6 (PA5)
ADC1 IN6 5 (PA6)
ADC1 IN7 4 (PA7)
ADC1 IN8 3 (PB0)
ADC1 IN9 33 (PB1)
ADC2 IN0 11 (PA0)
ADC2 IN1 10 (PA1)
ADC2 IN2 9 (PA2)
ADC2 IN3 8 (PA3)
ADC2 IN4 7 (PA4)
ADC2 IN5 6 (PA5)
ADC2 IN6 5 (PA6)
ADC2 IN7 4 (PA7)
ADC2 IN8 3 (PB0)
ADC2 IN9 33 (PB1)

GPIO

Pin Peripheral signal available on the pin Board macro
0 (PB11) ADC1_EXTI11, ADC2_EXTI11, I2C2_SDA, TIM2_CH4, USART3_RX
1 (PB10) I2C2_SCL, TIM2_CH3, USART3_TX
2 (PB2)
3 (PB0) ADC1_IN8, ADC2_IN8, TIM1_CH2N, TIM3_CH3
4 (PA7) ADC1_IN7, ADC2_IN7, SPI1_MOSI, TIM1_CH1N, TIM3_CH2 MOSI
5 (PA6) ADC1_IN6, ADC2_IN6, SPI1_MISO, TIM1_BKIN, TIM3_CH1 MISO
6 (PA5) ADC1_IN5, ADC2_IN5, SPI1_SCK SCK
7 (PA4) ADC1_IN4, ADC2_IN4, SPI1_NSS, USART2_CK SS
8 (PA3) ADC1_IN3, ADC2_IN3, TIM2_CH4, USART2_RX
9 (PA2) ADC1_IN2, ADC2_IN2, TIM2_CH3, USART2_TX
10 (PA1) ADC1_IN1, ADC2_IN1, TIM2_CH2, USART2_RTS
11 (PA0) ADC1_IN0, ADC2_IN0, SYS_WKUP, TIM2_CH1, TIM2_ETR, USART2_CTS
12 (PC15) ADC1_EXTI15, ADC2_EXTI15, RCC_OSC32_OUT
13 (PC14) RCC_OSC32_IN
14 (PC13) RTC_OUT, RTC_TAMPER
15 (PB7) I2C1_SDA, TIM4_CH2, USART1_RX SDA
16 (PB6) I2C1_SCL, TIM4_CH1, USART1_TX SCL
17 (PB5) I2C1_SMBA, SPI1_MOSI, TIM3_CH2
18 (PB4) SPI1_MISO, SYS_NJTRST, TIM3_CH1
19 (PB3) SPI1_SCK, SYS_JTDO-TRACESWO, TIM2_CH2
20 (PA15) SPI1_NSS, SYS_JTDI, TIM2_CH1, TIM2_ETR
21 (PA14) SYS_JTCK-SWCLK
22 (PA13) SYS_JTMS-SWDIO
23 (PA12) CAN_TX, TIM1_ETR, USART1_RTS, USB_DP
24 (PA11) CAN_RX, TIM1_CH4, USART1_CTS, USB_DM
25 (PA10) TIM1_CH3, USART1_RX
26 (PA9) TIM1_CH2, USART1_TX
27 (PA8) RCC_MCO, TIM1_CH1, USART1_CK
28 (PB15) SPI2_MOSI, TIM1_CH3N
29 (PB14) SPI2_MISO, TIM1_CH2N, USART3_RTS
30 (PB13) SPI2_SCK, TIM1_CH1N, USART3_CTS
31 (PB12) I2C2_SMBA, SPI2_NSS, TIM1_BKIN, USART3_CK
32 (PB8) CAN_RX, I2C1_SCL, TIM4_CH3
33 (PB1) ADC1_IN9, ADC2_IN9, TIM1_CH3N, TIM3_CH4 LED_BUILTIN
34 (PB9) CAN_TX, I2C1_SDA, TIM4_CH4
35 (PD0) RCC_OSC_IN
36 (PD1) RCC_OSC_OUT