AC97 CONTROLLER
S3C2416X RISC MICROPROCESSOR
24-14
8.3 AC97 GLOBAL STATUS REGISTER (AC_GLBSTAT)
This is the status register. When the interrupt is occurred, you can check what the interrupt source is.
Register
Address
R/W
Description
Reset Value
AC_GLBSTAT
0x5B000004
R
AC97 Global Status Register
0x00000001
AC_GLBSTAT
Bit
Description
Initial State
- [31:23]
Reserved.
0x00
Codec ready interrupt
[22]
0 = Not requested 1 = Requested
0
PCM out channel underrun
interrupt
[21]
0 = Not requested 1 = Requested
0
PCM in channel overrun interrupt
[20]
0 = Not requested 1 = Requested
0
MIC in channel overrun interrupt
[19]
0 = Not requested 1 = Requested
0
PCM out channel threshold
interrupt
[18]
0 = Not requested 1 = Requested
0
PCM in channel threshold
interrupt
[17]
0 = Not requested 1 = Requested
0
MIC in channel threshold
interrupt
[16]
0 = Not requested 1 = Requested
0
- [15:3]
Reserved.
0x000
Controller main state
[2:0] 000 = Idle 001 = Init 010 = Ready
011 = Active 100 = LP 101 = Warm
001
8.4 AC97 CODEC COMMAND REGISTER (AC_CODEC_CMD)
When you control writing or reading, you must set the Read enable bit, If you want to write data to the AC97
Codec, you set the index(or address) of the AC97 Codec and data.
Register
Address
R/W
Description
Reset Value
AC_CODEC_CMD
0x5B000008
R/W
AC97 Codec Command Register
0x00000000
AC_CODEC_CMD
Bit
Description
Initial State
-
[31:24] Reserved
0x00
Read enable
[23]
0 = Command write
(note)
1 = Status read
0
Address
[22:16] Codec command address
0x00
Data
[15:0] Codec command data
0x0000
NOTE
:
When the commands are written on the AC_CODDEC_CMD register, It is recommended that the delay time between
the command and the next command is more than 1 / 48kHz.
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...