User manual

DocID025091 Rev 1 21/30
UM1656 Hardware and layout
29
PB4
TIM3_CH1/SPI1_MISO/
SPI3_MISO/LCD_SEG8/
COMP2_INP
56 10
PB5
TIM3_CH2/I2C1_SMBA/
SPI1_MOSI/SPI3_MOSI
/I2S3_SD/LCD_SEG9/
COMP2_INP
57
9
PB6
TIM4_CH1/I2C1_SCL/
USART1_TX/COMP2_INP
58
8
PB7
TIM4_CH2/I2C1_SDA/
USART1_RX/PVD_IN/
COMP2_INP
59
7
PB8
TIM4_CH3/TIM10_CH1
/I2C1_SCL/LCD_SEG16
61
4
PB9
TIM4_CH4/TIM11_CH1
/I2C1_SDA/LCD_COM3
62
3
PB10
TIM2_CH3/I2C2_SCL/
USART3_TX/LCD_SEG10
29
30
PB11
TIM2_CH4/I2C2_SDA/
USART3_RX/LCD_SEG11
30
31
PB12
TIM10_CH1/I2C2_SMBA/
SPI2_NSS/I2S2_WS/
USART3_CK/LCD_SEG12/
ADC_IN18/COMP1_INP
33
32
PB13
TIM9_CH1/SPI2_SCK/
I2S2_CK/USART3_CTS/
LCD_SEG13/ADC_IN19
/COMP1_INP
34
32
PB14
TIM9_CH2/SPI2_MISO/
USART3_RTS/LCD_SEG14
/ADC_IN20/COMP1_INP
35
31
PB15
TIM11_CH1/SPI2_MOSI
/I2S2_SD/LCD_SEG15/
ADC_IN21/COMP1_INP/
RTC_REFIN
36
30
Table 5. MCU pin description versus board function (continued)
MCU pin Board function
Main
function
Alternate
functions
LQFP64
Push button
LED
SWD
OSC
Free I/O
Power supply
CN3
P1 P2