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SDIO Configuration
Feature
Option
Select SDIO or GPIO
SD Card
GPIO
Data Access Mode
Auto
DMA
PIO
SDIO Clock
Auto
24 MHz
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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Description
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.
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.
Limit SDIO Clock to 24MHz. Auto setting enables 48MHz clock if supported by
the SDIO device.
nanoETXexpress-SP/BIOS Operation
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