Kontron COMe Eval Carrier T6 - Manual (Page 23)

COM Express® Eval Carrier Type 6
22
GPIO J48
PIN
Description GPIO J48
Pin
Description
1 VCC 3.3V 2 GPO0 / SD_CLK
3 GPI0 / SD_DATA0 4 GPO1 / SD_CMD
5 GPI1 / SD_DATA1 6 GPO2 / SD_WP
7 GPI2 / SD_DATA2 8 GPO3 / SD_CD#
9 GPI3 / SD_DATA3 10 GND
Note1: 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.
Note2: The switching circuitry which selects GPIO or SDIO interface may
influence the signal quality of SDIO which results in detection or boot
issues with some fast SD/SDHC cards. Therefore it's recommended to
reduce SDIO interface speed to 24MHz in module's BIOS if supported