Allwinner A20 - Page 730

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 730 / 812
Offset: 0x00
Register Name: AC_CTL
Default Value: 0x0000_0000
Bit
Read/Wr
ite
Default
Description
0: Normal
1: Wake up codec from power down
Note: Self clear to “0”
0
/
/
/
6.10.7.2. AC97 FORMAT REGISTER
Offset: 0x04
Register Name: AC_FAT
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:9
/
/
/
8:7
R/W
0
TX_AUDIO_MODE
TX audio mode
00: 2-channel(PCM l/r main)
01: 6-channel(PCM l/r main, l/r surround, center, AFE)
10: Reserved
11: Reserved
6
R/W
0
DRA_SLOT_SEL
DRA additional slots select (available in 2-channel mode)
0: select slot 10, slot 11
1: select slot 7, slot 8
5
R/W
0
DRA_MODE
DRA mode
0 : Non-DRA
1 : DRA
4
R/W
0
VRA_MODE
VRA Mode
0 : Non-VRA
1 : VRA
3:2
R/W
0
TX_RES
TX Audio data resolution
00: 16-bit
01: 18-bit