DocID027213 Rev 1 21/35
UM1842 Hardware layout
34
PA13 JTMS-SWDIO 72 - - - - - -
SWDIO
- - - - -4 -42
PA14
JTCK-SWCLK,
I2S3ext_WS
76 - - - - - -
SWCLK
- - - - -2 -39
PA15
JTDI,
TIM2_CH1/TIM2_ETR,
SPI1_NSS,
SPI3_NSS/I2S3_WS
77 - - - - - - - - - - - - - -40
PB0
TIM1_CH2N,
TIM3_CH3, ADC1_8
35 - - - - - - - - - - - - -22 -
PB1
TIM1_CH3N,
TIM3_CH4, ADC1_9
36 - - - - - - - - - - - - -21 -
PB2 37 - - - - - - - - - - - - -24 -
PB3
JTDO-SWO,
TIM2_CH2, SPI1_SCK,
SPI3_SCK/I2S3_CK,
I2C2_SDA
89 - - - - - -
SWO
- - - - -6 -28
PB4
JTRST, TIM3_CH1,
SPI1_MISO,
SPI3_MISO,
I2S3ext_SD, I2C3_SDA
90 - - - - - - - - - - - - - -25
PB5
TIM3_CH2,
I2C1_SMBAL,
SPI1_MOSI,
SPI3_MOSI/I2S3_SD
91 - - - - - - - - - - - - - -26
PB6
TIM4_CH1, I2C1_SCL,
USART1_TX,
USB_FS_INT
92
SCL
- -
SCL
- - - - - - - - - -23
PB7
TIM4_CH2, I2C1_SDA,
USART1_RX
93 - - - - - - - - - - - - - -24
Table 5. MCU pin description versus board function (page 3 of 8)
(1)
(continued)
MCU pin Board function
Main
function
Alternate
functions
LQFP100
CS43L22
MP45DT02
L3GD20
LSM303DLHC
Pushbutton
LED
SWD
USB
OSC
Free I/O
Power supply
CN5
CN2
P1
P2
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