SDIO interface (SDIO) RM0008
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19.9.5 SDIO Command Response Register (SDIO_RESPCMD)
Address offset: 0x10
Reset value: 0x0000 0000
The SDIO_RESPCMD register contains the command index field of the last command
response received. If the command response transmission does not contain the command
index field (long or OCR response), the RESPCMD field is unknown, although it must
contain 111111b (the value of the reserved field from the response).
19.9.6 SDIO response 0..4 register (SDIO_RESPx)
Address offset: (0x14 + (4*x)); x = 0..4
Reset value: 0x0000 0000
The SDIO_RESP0/1/2/3/4 registers contain the status of a card, which is part of the receive
response.
The Card Status size is 32 or 127 bits, depending on the response type.
The most significant bit of the card status is received first. The SDIO_RESP3 register LSB is
always 0b.
313029282726252423222120191817161514131211109876543210
Reserved RESPCMD
r r
Bits 31:6 Reserved, always read as 0.
Bits 5:0 RESPCMD: Response command index. Read-only bit field. Contains the command index of the last
command response received.
313029282726252423222120191817161514131211109876543210
CARDSTATUSx
r
Bits 31:0 CARDSTATUSx: see Ta ble 1 3 1 .
Table 131. Response type and SDIO_RESPx registers
Register Short response Long response
SDIO_RESP1 Card Status[31:0] Card Status [127:96]
SDIO_RESP2 Unused Card Status [95:64]
SDIO_RESP3 Unused Card Status [63:32]
SDIO_RESP4 Unused Card Status [31:1]0b
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