7.4.2
Operating voltage
The STM32H7B3LIH6QU microSD
™
card interface can only be at 3.3 V on this board.
7.4.3
Limitations and hardware configuration
Fit JP15 to connect SD_DETECT1 to the STM32H7B3LIH6QU PF10 pin, and fit JP12 [1-2] to connect SDIO1_D0
to STM32H7B3LIH6QU PC8 pin.
7.4.4
Interface
Figure 25.
microSD
™
connector CN28
Table 30.
microSD
™
connector CN28
Pin number
Description
Pin number
Description
1
SD_DATA2 (PC10)
6
VSS / GND
2
SD_DATA3 (PC11)
7
SD_DATA0 (PC8)
3
SD_CMD (PD2)
8
SD_DATA1 (PC9)
4
3V3_AO
9
GND
5
SD_CLK (PC12)
10
Micro SDcard_detect (PF10)
7.5
EXT I
2
C connector
7.5.1
Description
I2C2 bus of STM32H7B3LIH6QU is connected to CN24 on STM32H7B3I-EVAL. The I
2
C functional
daughterboard can be mounted on CN24 and accessed by the microcontroller via the I2C2 bus.
EXT_RESET is controlled by MFX_GPO6 signal.
7.5.2
Operating voltage
The STM32H7B3LIH6QU EXT I
2
C connector can only be at 3.3 V on this board.
UM2662
EXT I2C connector
UM2662
-
Rev 1
page 36/95