
7.15
microSD
™
card
7.15.1
Description
The CN30 slot for the microSD
™
card is routed to the STM32U575AII6Q SDIO port. This interface is compliant
with SD Memory Card Specification Version 6.0: SDR104 SDMMC_CK speed limited to the maximum allowed I/O
speed. UHS-II mode is not supported. The microSD
™
card interface is on the bottom side of the board.
7.15.2
Operating voltage
The SD card interface is only compatible with the 3.3 V voltage range, from 2.7 to 3.6 V.
The SD card interface does not support the MCU low voltage 1.8 V range.
7.15.3
SD card interface
The SD card interface is used in four data lines D [3:0], one clock, one command line, and a card detection signal.
describes the HW configuration for the SDIO interface.
Table 29.
Hardware I/O configuration for the SDIO interface
I/O
Hardware
Setting
Configuration
PI0
SB74
ON
PI0 is connected to SDCARD DETECT
No other muxing
PC8
SB84
ON
PC8 is connected to SDCARD SDIO1_D0
OFF
PC8 is not connected to SDCARD SDIO1_D0
PC8 can be used for Motor control
PC9
SB83
ON
PC9 is connected to SDCARD SDIO1_D1
OFF
PC9 is not connected to SDCARD SDIO1_D1
PC9 can be used for TRACE ETM
PC10
SB85
ON
PC10 is connected to SDCARD SDIO1_D2
OFF
PC10 is not connected to SDCARD SDIO1_D2
PC10 can be used for TRACE ETM
PC11
R168
ON
PC11 is connected to SDCARD SDIO1_D3
No other muxing
PC12
SB91
ON
PC12 is connected to SDCARD SDIO1_CLK
OFF
PC12 is not connected to SD card SDIO1_CLK
PC12 can be used for trace ETM or STMod+
PD2
R171
ON
PD2 is connected to SD card SDIO1_CMD
No other muxing
1. The default configuration is in bold.
STM32U575I-EV
microSD™ card
UM2854
-
Rev 1
page 45/105