Rainbow Electronics AT91CAP9S250A User Manual
Page 635
635
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
37.7.4
AC’97 Controller Codec Channel Receive Holding Register
Register Name:
AC97C_CORHR
Access Type:
Read-only
• SDATA: Status Data
Data sent by the CODEC in the third AC’97 input frame slot (Slot 2).
37.7.5
AC’97 Controller Codec Channel Transmit Holding Register
Register Name:
AC97C_COTHR
Access Type:
Write-only
• READ: Read/Write command
0: Write operation to the CODEC register indexed by the CADDR address.
1: Read operation to the CODEC register indexed by the CADDR address.
This flag is sent during the second AC’97 frame slot
• CADDR: CODEC control register index
Data sent to the CODEC in the second AC’97 frame slot.
• CDATA: Command Data
Data sent to the CODEC in the third AC’97 frame slot (Slot 2).
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
SDATA
7
6
5
4
3
2
1
0
SDATA
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
READ
CADDR
15
14
13
12
11
10
9
8
CDATA
7
6
5
4
3
2
1
0
CDATA