7.5.3 Limitations and hardware configuration
I2C2 (PH4/PH5) is shared between EXT I
2
C module CN24, MB1486 Wi‑Fi
®
module U24, MFX I/O expander U25,
audio codec U48, MB1379 camera module CN2, and MB1370 LCD touch panel CN30.
7.5.4 Interface
Figure 26. EXT I
2
C connector CN24
1 7
2 8
Table 31.
EXT I
2
C connector CN24
Pin number Description Pin number Description
1 I2C2_SDA (PH5) 5 +3V3
2 NC 6 NC
3 I2C2_SCL (PH4) 7 GND
4 RESET (MFX_GPO6) 8 NC
7.6 32-bit SDRAM
7.6.1 Description
8 Mx32bit SDRAM ISSI IS42S32800J-6BLI is connected to SDRAM bank1 of FMC interface of
STM32H7B3LIH6QU.
7.6.2 Operating voltage
The STM32H7B3LIH6QU FMC interface (SDRAM, SRAM, and NOR) can only be at 3.3 V on this board.
7.6.3 Limitations and hardware configuration
Limitation with secondary function: OCSPI2.
UM2662
32-bit SDRAM
UM2662 - Rev 1
page 37/95
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