Board Power Supply - Vddmmc; Table 12. Pins Supplied By Vddmmc But '3.3V Only; Figure 17. Mcu Power: Vddmmc - ST STM32H7B3I-EVAL User Manual

6.3.5

Board power supply - VDDMMC

STM32H7B3I-EVAL can provide either 1.8 V or 3.3 V on VDDMMC power rail of the STM32H7B3LIH6QU
microcontroller.
This power rail can be used in different configurations:
• Default configuration: VDDMMC is forced to 3.3V only.
• SDIO2 configuration: VDDMMC is switched from 3.3 V to 1.8 V if necessary, and it can be powered off.
Default configuration (VDDMMC = 3.3 V only)
Important:
Some pins from STM32H7B3LIH6QU are supplied by VDDMMC, but are '3.3V only' and not linked to SDIO2 (Refer to
Table 12)
Pin name
PB8
PB9
PD6
PG9
PG10
PG11
PG12
PG13
PG14
UM2662 - Rev 1
Figure 17. MCU Power: VDDMMC
Table 12. Pins supplied by VDDMMC but '3.3V only'
DCMI_D6 || MEMS_LED || MOTOR_DFSDM1_CKIN7
OCSPI1_IO6 || MOTOR_DFSDM1_CKIN4
DCMI_D2 || FMC_NE3 || OCSPI2_IO6
Pin function
DCMI_D7 || DFSDM1_DATIN7
DCMI_VSYNC/RDY
DCMI_D3 || OCSPI2_IO7
OCSPI2_NCS
LED1
OCSPI1_IO7
UM2662
Power supply
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