ST STM32H747I-DISCO User Manual

UM2411 Rev 2 27/61
UM2411 Connectors
60
6.9 microSD card connector CN12
microSD cards with 4 Gbytes or more capacity are inserted in the receptacle CN12. Four
data bits of the SDMMC1 interface, CLK and CMD signals of the STM32H747XIH6 are used
to communicate with the microSD card at +3V3 only. The card insertion is detected by the
PI8 GPIO: when a microSD card is inserted, the logic level is 0, otherwise it is 1.
Figure 12. microSD connector CN12
Table 12. microSD connector CN12
Pin
number
Description
Pin
number
Description
1 SDIO1_D2 (PC10) 6 GND
2 SDIO1_D3 (PC11) 7 SDIO1_D0 (PC8)
3 SDIO1_CMD (PD2) 8 SDIO1_D1 (PC9)
4+3V3 9 GND
5 SDIO1_CK (PC12) 10 µSD_DETECT (PI8)

ST STM32H747I-DISCO Specifications

General

Brand	ST
Model	STM32H747I-DISCO
Category	Motherboard
Language	English