User's Manual

Table Of Contents
S3C2450X RISC MICROPROCESSOR HSMMC CONTROLLER
21-1
21 SD/MMC HOST CONTROLLER
This chapter describes the SD/SDIO/MMC/CE-ATA host controller and related registers supported by S3C2450X
RISC microprocessor.
1 OVERVIEW
The HSMMC (High-speed MMC) SDMMC is a combo host for Secure Digital card and MultiMedia Card. This host
is compatible for SD Association’s (SDA) Host Standard Specification.
You can interface your system with SD card and MMC card. This performance of this host is very powerful, you
would get 50MHz clock rate and access 8-bit data pin simultaneously.
We provide 2 Channel HSMMC support.
CH0 only 4 bit data interface support.
2 FEATURES
SD Standard Host Spec(ver 2.0) compatible
SD Memory Card Spec(ver 2.0) / High Speed MMC Spec(4.2) compatible
SDIO Card Spec(Ver 1.0) compatible
512 bytes FIFO for data Tx/Rx
48-bit Command Register
136-bit Response Register
CPU Interface and DMA data transfer mode
1bit / 4bit / 8bit(Channel 1 only) mode switch support.
Auto CMD12 support
Suspend / Resume support
Read Wait operation support
Card Interrupt support
CE-ATA mode support