S3C2440A RISC MICROPROCESSOR MMC/SD/SDIO CONTROLLER
19-1
19 MMC/SD/SDIO CONTROLLER
FEATURES
— SD Memory Card Spec (ver 1.0) / MMC Spec(2.11) compatible
— SDIO Card Spec (Ver 1.0) compatible
— 16 words (64 bytes) FIFO for data Tx/Rx
— 40-bit Command Register
— 136-bit Response Register
— 8-bit Prescaler logic (Freq = System Clock/(P + 1))
— Normal, and DMA data transfer mode(byte, halfword, word transfer)
— DMA burst4 access support(only word transfer)
— 1-bit/4-bit (wide bus) mode & block/stream mode switch support
BLOCK DIAGRAM
CMD Reg
(5byte)
Resp Reg
(17byte)
CMD Control
8bit Shift Reg
CRC7
Prescaler
FIFO
(64byte)
DAT Control
8bit Shift Reg
CRC16*4
DMA
INT
APB
I/F
8
8
8
8
32
32
32
32
32
32
PADDR
PSEL
PCLK
PWDATA
[31:0]
PRDATA
[31:0]
DREQ
DACK
INT
TxCMD
RxCMD
SDCLK
TxDAT[3:0]
RxDAT[3:0]
Figure 19-1. SD Interface block diagram
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