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PXAMMC(4) Device Drivers Manual (zaurus) PXAMMC(4)

pxammcMMC/SD/SDIO controller

pxammc0 at pxaip?
sdmmc* at pxammc?

The pxammc driver supports the MMC/SD/SDIO controller integrated in PXA255 and PXA27x processors.

The sdmmc(4) subsystem performs SD/MMC transactions to communicate with whatever MMC/SD/SDIO devices are inserted into the card slot.

intro(4), sdmmc(4)

The pxammc driver first appeared in OpenBSD 4.2.

The pxammc driver was written by Uwe Stuehler <‍>.

To work around a problem stated in an errata for the PXA27x processor family, the driver limits the bus frequency to 9.75 MHz instead of the theoretically supported maximum frequency of 19.5 MHz.

July 16, 2013 OpenBSD-6.0