at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 619

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

35.7.14
Register Name:
Access Type:
WKUP and SOF flags in AC97C_SR register are automatically cleared by a processor read operation.
• SOF: Start Of Frame
0: No Start of Frame has been detected since the last read of the Status Register.
1: At least one Start of frame has been detected since the last read of the Status Register.
• WKUP: Wake Up detection
0: No Wake-up has been detected.
1: At least one rising edge on SDATA_IN has been asynchronously detected. That means AC’97 Codec has notified a
wake-up.
• COEVT: CODEC Channel Event
A Codec channel event occurs when AC97C_COSR AND AC97C_COMR is not 0. COEVT flag is automatically cleared
when the channel event condition is cleared.
0: No event on the CODEC channel has been detected since the last read of the Status Register.
1: At least one event on the CODEC channel is active.
• CAEVT: Channel A Event
A channel A event occurs when AC97C_CASR AND AC97C_CAMR is not 0. CAEVT flag is automatically cleared when the
channel event condition is cleared.
0: No event on the channel A has been detected since the last read of the Status Register.
1: At least one event on the channel A is active.
• CBEVT: Channel B Event
A channel B event occurs when AC97C_CBSR AND AC97C_CBMR is not 0. CBEVT flag is automatically cleared when the
channel event condition is cleared.
0: No event on the channel B has been detected since the last read of the Status Register.
1: At least one event on the channel B is active.
6249D–ATARM–20-Dec-07
31
23
15
–
–
–
7
–
AC’97 Controller Status Register
30
22
14
AC97C_SR
Read-only
–
–
–
6
–
29
21
13
–
–
–
5
CBEVT
28
20
12
–
–
–
4
CAEVT
27
19
11
–
–
–
3
AT91SAM9263 Preliminary
COEVT
26
18
10
–
–
–
2
WKUP
25
17
–
–
9
–
1
SOF
24
16
–
–
8
–
0
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