
Hardware layout
UM1842
20/35
DocID027213 Rev 1
PA4
SPI1_NSS,
SPI3_NSS/I2S3_WS,
USART2_CK, ADC1_4
29
LRCK/AIN
1x
-
-
-
-
-
-
-
-
-
-
-
-
16
-
PA5
TIM2_CH1/TIM2_ETR,
SPI1_SCK, ADC1_5
30
-
-
SCL/SP
C
-
-
-
-
-
-
-
-
-
-
15
-
PA6
TIM1_BKIN,
TIM3_CH1,
SPI1_MISO, ADC1_6
31
-
-
SDO
-
-
-
-
-
-
-
-
-
-
18
-
PA7
TIM1_CH1N,
TIM3_CH2,
SPI1_MOSI, ADC1_7
32
-
-
SDA/SDI/SDO
-
-
-
-
-
-
-
-
-
-
17
-
PA8
MCO_1, TIM1_CH1,
I2C3_SCL,
USART1_CK,
USB_FS_SOF
67
-
-
-
-
-
-
-
-
-
-
-
-
-
-
43
PA9
TIM1_CH2,
I2C3_SMBAL,
USART1_TX,
USB_FS_VBUS
68
-
-
-
-
-
GREEN
-
VBUS
-
-
-
1
-
-
44
PA10
TIM1_CH3,
USART1_RX,
USB_FS_ID
69
-
-
-
-
-
-
-
ID
-
-
-
4
-
-
41
PA11
TIM1_CH4,
USART1_CTS,
USART6_TX,
USB_FS_DM
70
-
-
-
-
-
-
-
DM
-
-
-
2
-
-
-
PA12
TIM1_ETR,
USART1_RTS,
USART6_RX,
USB_FS_DP
71
-
-
-
-
-
-
-
DP
-
-
-
3
-
-
-
Table 5. MCU pin description versus board function (page 2 of 8)
(1)
(continued)
MCU pin
Board function
Main
function
Alternate
functions
LQ
FP1
0
0
CS4
3
L2
2
MP45DT
02
L3G
D
20
LSM303
DLHC
P
u
shbutton
LED
SWD
USB
OSC
F
ree I
/O
Power supply
CN5
CN2
P1
P2