Kontron COMe Ref. Carrier T2 - Manual (Page 37)

COM Express™ miniBaseboard Type 2 / Connectors and Features
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5.6 SD-Card
The SD-Card standard is a standard for removable memory storages designed and licensed by the SD Card Association
(http://sdcard.org). The card form factor, electrical interface and protocol are all part of the SD Card specification.
COM Express™ Type 2 pin-out based modules may provide a SDIO interface shared with GPIO signals. Therefore on COM
Express™ miniBaseboard Type 2 a SD-Card connector is available. Please check the documentation of your module if
SDIO is supported.
SD-Card J81 PIN SD-Card connector COM Express™ Module pin-out
1 DAT3/CD - Data Line 3/Card Detection GPI3 / SD_DATA3
2 CMD - Command/Response GPO1 / SD_CMD
3 VSS 1 - Supply Voltage - GND -
4 VDD - Supply Voltage - 3.3V -
5 CLK - Clock GPO0 / SD_CLK
6 VSS2 - Supply Voltage - GND -
7 DAT0 - Data Line 0 GPI0 / SD_DATA0
8 DAT1 - Data Line 1 GPI1 / SD_DATA1
9 DAT2 - Data Line 2 GPI2 / SD_DATA2
10 Card Detect GPO3 / SD_CD#
11 Write Protect GPO2 / SD_WP
12 COM -
13 Shield Ground 0 -
14 Shield Ground 1 -
Note: A SD-Card is detected if Card Detect is at low level. The write protection is active (read only) if SD_WP is at
high level.