Intel 82801EB Manuale Utente
Intel® ICH5 AC ’97 Controller Theory of Operation
R
32
AC ’97 Programmer’s Reference Manual
• Modem D3 configuration is dependent on wake-up on ring event enable. If wake-up on ring is
enabled, GPIO cannot go down in D3.
Note: When a codec section is powered back on the Powerdown Control/Status register (index 26h)
should be read to verify that the section is ready before attempting any further operations.
Configuration Number 1: Single Audio Codec (Primary):
Table 14. Power State Mapping for Audio Single or Dual (Split) Codec Desktop Transition
PR<0:5> + (EAPD)
+12 +5
from
+12
+3.3
Digital
+3.3
Vaux
Digital
Comments
E
A
P
D
C
L
K
AC-
Link
Mixer
Vref.
Mixer D
A
C
A
D
C
Device
State
7
5
4 3 2
1
0
D0 0
0
0 0 0 0
0
On
On
On On All
on
D1 0
0
0 0 0 1 1 On On On On -DAC,
-ADC
D2
1 0 0
0
1 1
1
On On On
On -Mix,
-Amp
D3 1
1 1
1 1 1
1
Off
Off
Off On -Clock,
-Vref
Configuration Number 2: Single Modem Codec (Primary):
Table 15. Power State Mapping for Modem Single Codec Desktop Transition
PR<A:D> + MLNK
(other power control (PRx) bits do not apply for Intel
®
ICH5
implementation)
+12 +5
from
+12
+3.3
Digital
+3.3
Vaux
Digital
Comments
Sdata_In
D
A
C
1
A
D
C
1
Vref GPIO
Device State
MLNK
D
C
B
A
D0 0
0
0
0
0
On
On
On
On
All
on
D1 0
1 1 0 0
On On On On -DAC,
-ADC
D2
0
1
1
0
0
On
On
On
On
Same as D1
D3
(wake-up on ring)
1 1
1
0
0
Off Off Off
On -Sdata_In,
D3
1
1 1 1 1
Off Off Off
On -Sdata_In,
-Vref, -GPIO