Table 15. ARDUINO
®
-included Zio connector (CN7) pinout
MCU
function
STM32
pin
Signal name Pin name Pin Pin Pin name Signal name
STM32
pin
MCU
function
SAI2_A PC6 SAI_C_MCLK D16 1 2 D15 I2C_A_SCL PB8 I2C1
SAI2_A PD11 SAI_C_SD D17 3 4 D14 I2C_A_SDA PB9 I2C1
SAI2_A PB13 SAI_C_SCK D18 5 6 VREFP - - -
SAI2_A PD12 SAI_C_FS D19 7 8 GND - - -
SAI1_B/
SPI3
PA4 SAI_D_FS
D20
(7)
9 10 D13 SPI_A_SCK PA5 SPI1
SAI1_B/
SPI3
PB4 SAI_D_MCLK
D21
(7)(8)
11 12 D12 SPI_A_MISO PA6 SPI1
SAI1_B/
SPI3
PB5
SAI_D_SD/
SPI_B_MOSI
D22
(5)(7)(8)
13 14 D11
SPI_A_MOSI/
TIM_E_PWM1
PA7 SPI1
SAI1_B/
SPI3
PB3
SAI_D_SCK/
SPI_B_SCK
D23
(6)
(7)(8)
15 16 D10
SPI_A_CS /
TIM_B_PWM3
(1)
PD14
SPI1/
TIM4_CH3
SAI1/SPI3 PA4 SPI_B_NSS
D24
(8)
17 18 D9 TIM_B_PWM2 PD15 TIM4_CH4
SAI1/SPI3 PB4 SPI_B_MISO
D25
(8)
19 20 D8 IO PF12 -
1. Due to muxing constraints, the SPI_NSS is not available as an alternate on this I/O, so this pin is affected by an I/O function
to do the chip selection.
A solder bridge (SB20) is used to disconnect the VREFP to the ARDUINO
®
connector CN7 pin 6.
• SB20 OFF: VREFP is not connected to the ARDUINO
®
connector CN7 pin 6 (Default configuration).
• SB20 ON: VREFP is connected to the ARDUINO
®
connector CN7 pin 6.
Table 16. ARDUINO
®
-included Zio connector (CN8) pinout
MCU
function
STM32
pin
Signal name Pin name Pin Pin Pin name Signal name
STM32
pin
MCU
function
RES - NC NC 1 2 D43 SDMMC_D0 PC8 SDMMC1
IO REF - IOREF IOREF 3 4 D44 SDMMC_D1 PC9 SDMMC1
RESET NRST NRST NRST 5 6 D45 SDMMC_D2 PC10 SDMMC1
3V3 I/O - 3V3 3V3 7 8 D46 SDMMC_D3 PC11 SDMMC1
5V output - 5V 5V 9 10 D47 SDMMC_CK PC12 SDMMC1
GND - GND GND 11 12 D48 SDMMC_CMD PD2 SDMMC1
GND - GND GND 13 14 D49 IO PF3 -
VIN - VIN VIN 15 16 D50 IO PF5 -
UM2861
Zio connectors supporting ARDUINO® Uno V3
UM2861 - Rev 5
page 33/49
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