
YMF753
March 6, 2001
12
28h : Extended Audio ID (Read Only, Default: xxx4h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
ID1
ID0
-
REV1-0
AMAP
LDAC SDAC CDAC
-
SPDIF
-
ID1,ID0.........These bits indicate CODEC ID. The states are determined by setting both No.46 and 45 pins.
When MSEL is high, they are fixed to “Primary ID00”.
ID1# (No.46)
ID0# (No.45)
Pin Status
Logic Value
Pin Status
Logic Value
CODEC ID
Configuration
OPEN (“H”)
“0”
OPEN (“H”)
“0”
Primary ID00
OPEN (“H”)
“0”
GND (“L”)
“1”
Secondary ID01
GND (“L”)
“1”
OPEN (“H”)
“0”
Secondary ID10
GND (“L”)
“1”
GND (“L”)
“1”
Secondary ID11
REV1-0.........These bits are hardwired to “01b”, which indicates AC’97 Revision 2.2 Compliant.
AMAP...........This bit is hardwired to “1”. It indicates that the PCM DAC uses data of the standard slot into
twelve slots, as the following table.
Slot Number
CODEC
ID
PCM Left DAC
PCM Right DAC
00
Slot 3
Slot 4
Original definition (master)
01
Slot 3
Slot 4
Original definition (docking)
10
Slot 7
Slot 8
Left / Right surround channels
11
Slot 6
Slot 9
Center / LFE channels
LDAC ...........When PCM DAC uses the LFE channel, this bit is set to “1”.
SDAC ...........When PCM DAC uses the surround channels, this bit is set to “1”.
CDAC ...........When PCM DAC uses the center channel, this bit is set to “1”.
SPDIF ...........This bit is hardwired to “1”, which indicates that SPDIF output is compliant with AC’97
Revision 2.2.
2Ah : Ext Audio Stat/Ctrl (Read/Write, Default: 0400h)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
-
SPCV
-
SPSA1-0
-
SPDIF
-
SPCV ............This bit is hardwired to “1”, which indicates that SPDIF output configuration is valid.
SPSA1-0 .......These bits select DIT output slot.
SPSA1
SPSA0
L-ch Slot Number
R-ch Slot Number
0
Slot 3
Slot 4
0
1
Slot 7
Slot 8
1
0
Slot 6
Slot 9
1
Slot 10
Slot 11
SPDIF ...........This bit selects whether the SPDIF signal is output from DIT or not.
“0” : DIT is power down state, and outputs low level.
“1” : SPDIF signal is output from DIT.