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Field
Name
R/W
Description
0100: Block length=24=16 bytes
0101: Block length=25=32 bytes
0110: Block length=26=64 bytes
0111: Block length=27=128 bytes
1000: Block length=28=256 bytes
1001: Block length=29=512 bytes
1010: Block length=210=1024 bytes
1011: Block length=211=2048 bytes
1100: Block length=212=4096 bytes
1101: Block length=213=8192 bytes
1110: Block length=214=16384 bytes
1111: Reserved
8
RWSTR
R/W
Read Wait Start
0: Invalid
1: Start read wait operation
9
RWSTOP
R/W
Read Wait Stop Enable
If RWSTR is set, stop read operation can be enabled.
0: Disable
1: Enable
10
RDWAIT
R/W
Read Wait Mode
0: Control stop SDIO_D2
1: Control use SDIO_DK
11
SDIOF
R/W
SD I/O Enable Functions
If this bit is set, DPSM wil execute specific operation of SD I/O card.
31:12
Reserved
SDIO data counter register (SDIO_DCNT)
Offset address: 0x30
Reset value: 0x0000 0000
When DPSM enters Wait_R or Wait_S state from the idle state, SDIO_DCNT
loads values from SDIO_DATALEN, and in the data transmission process, the
counter will count down to 0, and then DPSM will enter the idle state and set
DATAEND flag.
Field
Name
R/W
Description
24:0
DATACNT
R
Data Count Number
Store the number of data bytes to be transmitted.
31:25
Reserved
Note: This register can be read only by the end of data transmission.
SDIO state register (SDIO_STS)
Offset address: 0x34
Reset value: 0x0000 0000
SDIO_STS is a read-only register, and it contains two kinds of flags: