Spi Mode With Mmc, Sd Card, And Sdio Card Devices; Spi Mode Signals - Intel PXA27 Series Design Manual

15.4.3

SPI Mode with MMC, SD Card, and SDIO Card Devices

This subsection provides guidelines for interfacing the MMC/SD/SDIO card controller of the
PXA27x processor to MMC, SD card, and SDIO card devices using the SPI communications
protocol.
15.4.3.1

SPI Mode Signals

See Table 15-8
protocol for interfacing to MMC, SD Card, and SDIO Card device sockets.
Table 15-8. SPI Protocol Interface Signals
Signal Name
MMCLK
MMCMD
MMDAT<0>
MMDAT<1>
MMDAT<2>/ MMCCS<0>
MMDAT<3>/ MMCCS<1>
®
Intel PXA27x Processor Family Design Guide
for description of the controller signals MMC/SD/SDIO Card used with the SPI
Direction
(SPI Mode)
Output SPI bus clock
Output Output for SPI command token and write data
Input Input for SPI response token and read data
Input Input to signal SDIO interrupts to the controller
Output SPI CS0 chip select
Output SPI CS1 chip select
MultiMediaCard/SD/SDIO Card Controller
Description
II:15-11