User's Manual l MBa57xx UM 0100 l © 2020, TQ-Systems GmbH
Page 31
4.2.10
SD card
The SD card slot is directly with a 4-bit interface connected to the TQMa57xx SDHC controller.
The SDHC controller in the TQMa57xx supports the UHS-I mode, which is not used on the MBa57xx.
The maximum available mode is High-Speed. Booting from SD card is possible, see chapter 4.3.6.
All data lines are ESD protected.
Illustration 18:
Block diagram SD card
Table 38:
Pinout SD card, X14
Pin
Pin name
Signal
Remark
1
CD/DAT3/CS
MMC1_DAT3
10 kΩ PU to 3.3 V + ESD protection
2
CMD/DI
MMC1_CMD
10 kΩ PU to 3.3 V + ESD protection
3
VSS1
DGND
–
4
VDD
VCC3V3_SDCARD 3.3 V
5
CLK
MMC1_CLK
ESD protection
6
VSS2
DGND
–
7
DAT0/DO
MMC1_DAT0
10 kΩ PU to 3.3 V + ESD protection
8
DAT1
MMC1_DAT1
10 kΩ PU to 3.3 V + ESD protection
9
DAT2
MMC1_DAT2
10 kΩ PU to 3.3 V + ESD protection
CDS
CARD_DETECT
MMC1_CD#
10 kΩ PU to 3.3 V + ESD protection
COM
COMMON
DGND
–
WP
WRITE_PROTECT
MMC1_WP
10 kΩ PU to 3.3 V + ESD protection
M1, M2
SHIELD
DGND
SHIELD