Information

Enhanced Secure Digital Host Controller
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1
11-2 Freescale Semiconductor
The eSDHC acts as a bridge, passing host bus transactions to SD card/SDIO/MMCs by sending commands
and performing data accesses to or from the cards. It handles the SD/SDIO/MMC protocol at the
transmission level. Figure 11-1 shows connection of the eSDHC.
Figure 11-1. System Connection of the eSDHC
MMC
SD Card
SDIO Card
DMA Interface
Register
Transceiver
Host Controller
CSB Bus
Register Bus
Card
Power
Slot
Supply
Bank
MPC8308
MMC/SD/SDIO/