8.4 P2 STMod+ connector
The standard 20-pin STMod+ connector is available on the STM32H735G-DK board to increase compatibility with
external boards and modules from the Ecosystem of microcontrollers. STMod+ includes UART or SPI interface
signals for communication with the host MCU and dedicated solder bridges allow configuring the external board to
be controlled by the UART7 or SPI5 serial interface of the STM32H735IGK6U MCU.
Table 14. P2 STMod+ connector pinout
Solder bridge
Setting
(1)
Description
SB6, SB10, SB14, and SB15
SB7, SB8, SB12, and SB17
ON
OFF
UART7 connected to STMod+
SPI5 disconnected to STMod+
SB6, SB10, SB14, and SB15
SB7, SB8, SB12, and SB17
OFF
ON
UART7 disconnected to STMod+STMod+
SPI5 connected to STMod+
1. The default configuration is in bold.
By default, it is designed to support an ST-dedicated fan-out board to connect different modules or board
extensions from different manufacturers.
The fan-out board also embeds a 3.3 V regulator and I
2
C level shifters. For more detailed information on the fan-
out board, refer to the user manual STMod+ fan-out expansion board for STM32 Discovery kits and Evaluation
boards (UM2695).
For details about STMod+ interface, refer to the technical note STMod+ interface specification (TN1238).
Figure 13. P2 STMod+ connector
Table 15. P2 STMod+ connector pinout
Pin number
Description Pin number Description
1 SPI5_NSS / USART7_CTS (PF6/PF9) 11 INT (PH12)
2 SPI5_MOSI / USART7_TX (PF9/PF7) 12 RESET (PH1)
3 SPI5_MISO / USART7_RX (PF8/PF6) 13 ADC (PA5)
4 SPI5_SCK / USART7_RTS (PF7/PF8) 14 PWM (PD14)
5 GND 15 +5V
6 +5V 16 GND
7 I2C4_SCL (PF14) 17 DFSDM1-DATIN2 (PE7)
8 SPI5_MOSIs (PF11) 18 DFSDM1-CKOUT (PE9)
9 SPI5_MISOs (PH7) 19 DFSDM1-DATIN4 (PE10)
10 I2C4_SDA (PF15) 20 DFSDM1-DATIN6 (PF13)
UM2679
P2 STMod+ connector
UM2679 - Rev 1
page 22/42
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