ST NUCLEO-H7S3L8 - Solder bridge configuration for expansion

4. PC14, PC15, PH0, and PH1 are disconnected by default. Refer to Table 16 for details.
5. PB4 is on CN12 pin27 by default (SB44 ON and SB43 OFF), if motor shield IHM11 is used, disconnect PB4 and connect
PE15 by setting SB44 OFF and SB43 ON.
6. PA11 and PE6 are on CN12 pin14 together. When using PA11, keep PE6 as tristate, and vice versa. PE6 is used as a
BKIN2 signal for motor shields.
7.3 Solder bridge configuration for the expansion connector
Table 16 details the solder bridges of the STM32H7Rx/7Sx Nucleo-144 board for the expansion connector.
Table 16. Solder bridge configuration
Definition
Solder Bridge
Setting
(1)
Comment
IOREF selection
SB4
OFF IOREF is not connected to the 3V3 power supply.
ON IOREF is connected to the 3V3 power supply.
SB5
ON IOREF is connected to the VDD power supply.
OFF IOREF is not connected to the VDD power supply.
SB6
OFF IOREF is not connected to the 1V8 power supply.
ON IOREF is connected to the 1V8 power supply.
Zio A4
(CN9 pin9)
SB8
OFF PB9 is not connected to CN9 pin9.
ON PB9 is connected to CN9 pin9 as I2C_SDA.
SB10
ON PC5 is connected to CN9 pin9 as an ADC input.
OFF PC5 is not connected to CN9 pin9.
Zio A5
(CN9 pin11)
SB7
OFF PB8 is not connected to CN9 pin11.
ON PB8 is connected to CN9 pin11 as I2C_SCL.
SB9
ON PF11 is connected to CN9 pin11 as an ADC input.
OFF PF11 is not connected to CN9 pin11.
SDMMC IO
PC8/PC9
SB38
ON
PC8 is connected to ST morpho CN12 pin 2 and Zio
CN8 pin 2: SDMMC_D0 signal quality can be
impacted.
OFF
PC8 is not connected to ST morpho CN12 pin 2 to avoid
stub on Zio CN8 SDMMC_D0.
SB37
ON
PC9 is connected to ST morpho CN12 pin 1 and Zio
CN8 pin 4. SDMMC_D1 signal quality can be
impacted.
OFF
PC9 is not connected to ST morpho CN12 pin 1 to avoid
stub on Zio CN8 SDMMC_D1.
Trace data
PC12/PD2
SB11
ON
PC12 is connected to MIPI20 trace D3 and Zio CN8
pin 10: Trace signal quality can be impacted.
OFF
PC12 is not connected to Zio CN8 pin 10 to avoid stub
on trace signal.
SB12
ON
PD2 is connected to MIPI20 trace D2 and Zio CN8
pin 12: Trace signal quality can be impacted.
OFF
PD2 is not connected to Zio CN8 pin 12 to avoid stub on
trace signal.
OSC32_IN
PC14
SB64
OFF PC14 is disconnected from ST morpho CN11 pin25.
ON PC14 is connected to ST morpho CN11 pin25.
OSC32_OUT
PC15
SB65
OFF PC15 is disconnected from ST morpho CN11 pin27.
ON PC15 is connected to ST morpho CN11 pin27.
OSC_IN SB66
OFF PH0 is disconnected from ST morpho CN11 pin29.
UM3276
Expansion connectors
UM3276 - Rev 1
page 30/40