APPOTECH CW6632B - Page 102

96 12.3 SDC Special Function Registers
CW6632B Bluetooth 3.0 Audio Player SOC Version 1.0.0
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1 = Enable
ORISE: Edge selection for sending data and command
0 = Falling
1 = Rising
Register 12-3 SDCON2 – SD host control register 2
Position
7
6
5
4
3
2
1
0
Name
RCRCE
DCRCE
NRPS
BUSY
SDEC
CRCS
Default
x
x
0
x
0
x
x
x
Access
RO
RO
RO
RO
R/W
RO
RO
RO
RCRCE: Response packet CRC error flag
Update when the response CRC is receiving, so it is invalid if kick start command by 010/100 and it is only valid in
R1 or R1b, software should ignore this bit in R2/R3/R6/R7.
0 = Inactive
1 = Error detected
DCRCE: Data packet CRC error flag
Update when the data CRC is receiving, so it is only valid after operation “read data” is done.
0 = Enactive
1 = Error detected
NRPS: No response received
When command is kick start by „001/011/101/111‟ this bit indicate that response timeout (no response is received in
256 SD clocks after command).
0 = Response received
1 = No response received
BUSY: Busy flag. The logic level of pad DAT0
0 = Busy
1 = Free
SDEC: SD decryption enables
0 = Disable
1 = Enable
CRCS: CRC status of the sent data packet
Update when the CRC status is receiving, so it is only valid after operation “write data” is done.
101 = Error transmission
010 = Non-erroneous transmission
111 = Flash error
Register 12-4 SDBAUD – SD host baud rate
Position
7
6
5
4
3
2
1
0
Name
SDBAUD
Default
0
0
0
0
0
0
0
0