Allwinner A20 - AC97 Interface Register Description

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 728 / 812
Register Name
Offset
Description
AC_CTL
0x00
AC97 Control Register
AC_FAT
0x04
AC97 Format Register
AC_CMD
0x08
AC97 Command Register
AC_CS
0x0C
AC97 Codec Status Register
AC_TX_FIFO
0x10
AC97 TX FIFO Register
AC_RX_FIFO
0x14
AC97 RX FIFO Register
AC_FCTL
0x18
AC97 FIFO Control Register
AC_FSTA
0x1C
AC97 FIFO Status Register
AC_INT
0x20
AC97 Interrupt Control Register
AC_ISTA
0x24
AC97 Interrupt Status Register
AC_TX_CNT
0x28
AC97 TX Counter register
AC_RX_CNT
0x2C
AC97 RX Counter register
6.10.7. AC97 Interface Register Description
6.10.7.1. AC97 CONTROL REGISTER
Offset: 0x00
Register Name: AC_CTL
Default Value: 0x0000_0000
Bit
Read/Wr
ite
Default
Description
31:19
/
/
/
18
R
0
CS_RF
CODEC Status Register FLAG
0: Empty
1: Full
17
R
0
CMD_RF
CMD Register FLAG
0: Empty
1: Full