Laptop User Manual

AC97 CONTROLLER S3C2440A RISC MICROPROCESSOR
24-10
AC97 CODEC STATUS REGISTER (AC_CODEC_STAT)
Register Address R/W Description Reset Value
AC_CODEC_STAT 0x5B00000C R AC97 Codec Status Register 0x00000000
AC_CODEC_STAT Bit Description Initial State
Reserved
[31:23] 0x00
Address
[22:16] CODEC Status Address 0x00
Data
[15:0] CODEC Status Data 0x0000
Note: If you want to read data from AC97 codec register via the AC_CODEC_STAT register, you should follow these steps.
1. Write command address and data on the AC_CODEC_CMD register with Bit [23] =1.
2. Have a delay time.
3. Read command address and data from AC_CODEC_STAT register.
AC97 PCM OUT/IN CHANNEL FIFO ADDRESS REGISTER (AC_PCMADDR)
Register Address R/W Description Reset Value
AC_PCMADDR 0x5B000010 R AC97 PCM Out/In Channel FIFO Address Register 0x00000000
AC_PCMADDR Bit Description Initial State
Reserved
[31:28] 0000
Out Read Address
[27:24] PCM out channel FIFO read address 0000
Reserved
[23:20] 0000
In Read Address
[19:16] PCM in channel FIFO read address 0000
Reserved
[15:12] 0000
Out Write Address
[11:8] PCM out channel FIFO write address 0000
Reserved
[7:4] 0000
In Write Address
[3:0] PCM in channel FIFO write address 0000