Renesas SH7781 - Manual (Page 1229)

24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1199 of 1658
REJ09B0261-0100
Bit Bit Name
Initial
Value R/W Description
6 RTY6 0 R/W Response Type 5
Sets data busy status from the MMC card.
This bit is set to perform CRC check for the response
(R2 response of MMC mode) when the command that
reads, as a response, the register value of the
multimedia card, including CRC7, is executed.
RTY2 to RTY0 must be set to 101.
5 RTY5 0 R/W Response Type 5
Sets data busy status from the MMC card.
0: A command without data busy
1: A command with data busy
4 RTY4 0 R/W Response Type 4
Specifies that the command response CRC is checked
through CRC7. Bits RTY2 to RTY0 should be set to
100.
0: Does not check CRC through CRC7
1: Checks CRC through CRC7
3
⎯ 0
R Reserved
These bits are always read as 0. The write value should
always be 0.
2
1
0
RTY2
RTY1
RTY0
0
0
0
R/W
R/W
R/W
Response Types 2 to 0
These bits specify the number of command response
bytes.
000: A command needs no command response.
001: Setting prohibited
010: Setting prohibited
011: Setting prohibited
100: A command needs 6-byte command responses.
Specified by R1, R1b, R3, R4, and R5 responses.
101: A command needs a 17-byte command response.
Specified by R2 response.
110: Setting prohibited
111: Setting prohibited