1 ac’97 controller mode register – Rainbow Electronics AT91CAP9S250A User Manual
Page 633
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633
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
37.7.1
AC’97 Controller Mode Register
Name:
AC97C_MR
Access Type:
Read-Write
• VRA: Variable Rate (for Data Slots 3-12)
0: Variable Rate is inactive. (48 KHz only)
1: Variable Rate is active.
• WRST: Warm Reset
0: Warm Reset is inactive.
1: Warm Reset is active.
• ENA: AC’97 Controller Global Enable
0: No effect. AC’97 function as well as access to other AC’97 Controller registers are disabled.
1: Activates the AC’97 function.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
–
–
–
–
VRA
WRST
ENA
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