Kontron COMe-cSP2 - Manual (Page 86)

COMe-cSP2 / BIOS Operation
81
Devices Conficuration - On-Module SDIO Configuration
Feature Option Description
Enable SDIO Host Controller Disable
HC0
HC0+1 Disable/Enable SDIO host controllers. Numbers refer to the
three possible HC‘s (named 0, 1 and 2)
SDIO Controller GPIO
SDIO SDIO Slot 1 lines may be routed as secondary SDIO channel
or as generic I/O. If using GPIO control with this module it is
necessary to set this switch to GPIO
Data Access Mode Auto
DMA
PIO Auto Option: Access SD device in DMA mode if controller
supports it, otherwise in PIO mode. DMA Option: Access SD
device in DMA mode. PIO Option: Access SD devie in PIO
mode.