Ac97 Global Control Register (Ac_Glbctrl) - Samsung S3C2416 User Manual

S3C2416X RISC MICROPROCESSOR

8.2 AC97 GLOBAL CONTROL REGISTER (AC_GLBCTRL)

This is the global register of the AC97 controller. There are interrupt control registers, DMA control registers, AC-
Link control register, data transmission control register and related reset control register.
Register
AC_GLBCTRL
AC_GLBCTRL
-
Codec ready interrupt enable
PCM out channel underrun
interrupt enable
PCM in channel overrun
interrupt enable
Mic in channel overrun
interrupt enable
PCM out channel threshold
interrupt enable
PCM in channel threshold
interrupt enable
MIC in channel threshold
interrupt enable
-
PCM out channel transfer
mode
PCM in channel transfer
mode
MIC in channel transfer mode
-
Transfer data enable using
AC-link
AC-Link on
Warm reset
Cold reset
NOTES:
1. During Cold reset, writing to any AC97 Registers will not affected.
2. When recovering from Cold reset, writing to any AC97 Registers will not be affected.
Example: For consecutive Cold reset and Warm reset, first set AC_GLBCTRL=0x1 then set AC_GLBCTRL=0x0.
After recovering from cold reset set AC_GLBCTRL=0x2 then AC_GLBCTRL=0x0.
Address R/W
0x5B000000 R/W
Bit
[31:23] Reserved.
[22] 0 = Disable
1 = Enable
[21] 0 = Disable
1 = Enable ( FIFO is empty)
[20] 0 = Disable
1 = Enable ( FIFO is full)
[19] 0 = Disable
1 = Enable ( FIFO is full)
[18] 0 = Disable
1 = Enable ( FIFO is half empty)
[17] 0 = Disable
1 = Enable ( FIFO is half full)
[16] 0 = Disable
1 = Enable ( FIFO is half full)
[15:14]
Reserved.
[13:12]
00 = Off
[11:10]
00 = Off
[9:8]
00 = Off
[7:4]
Reserved.
[3]
0 = Disable
[2] 0 = Off
1 = SYNC signal transfer to Codec
[1] 0 = Normal
1 = Wake up codec from power down
[0]
0 = Normal
1 = Reset Codec and Controller Registers
Description
AC97 Global Control Register
Description
01 = PIO 10 = DMA
01 = PIO 10 = DMA
01 = PIO 10 = DMA
1 = Enable
(note 2)
AC97 CONTROLLER
Reset Value
0x000000
Initial State
11 = Reserved
11 = Reserved
11 = Reserved
0000
(note 1)
0
0
0
0
0
0
0
0
00
00
00
00
0
0
0
0
24-13