Information

card, which is also known as SDIO card, provides high-speed data I/O with low power
consumption for mobile electronic devices. For the sake of simplicity, the figure does not
show cards with reduced size or mini cards.
MMC/SD/SDIO
DMA Interface
Transceiver
Crossbar switch
Card Slot
Power Supply
MMC card
Host Controller
Peripheral bus
SD card
SDIO card
Figure 49-1. System connection of the SDHC
CE-ATA is a hard drive interface that is optimized for embedded applications storage.
The device is layered on the top of the MMC protocol stack using the same physical
interface. The interface electrical and signaling definition is defined like that in the MMC
specification. Refer to the CE-ATA specification for more details.
Overview
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
1378 Freescale Semiconductor, Inc.