COMe-mSP1 / BIOS Operation
SDIO Configuration
Feature Option Description
Select SDIO or GPIO
SD Card
GPIO
The SD card interface is shared with module GPIO
signals. To use GPIO with this module it is necessary to
set this switch to GPIO.
Data Access Mode
Auto
DMA
PIO
Auto: Access SD device in DMA mode if controller
supports it, otherwise in PIO mode.
DMA: Access SD device in DMA mode.
PIO: Access SD device in PIO mode.
SDIO Clock
Auto
24 MHz
Limit SDIO Clock to 24MHz. Auto setting enables 48MHz
clock if supported by the SDIO device.
The SDIO/GPIO switch is only supported on hardware revisions CE 4.x.x or newer. Modules
with revision CE 1.x.x must be reworked to enable GPIO functionality.
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