92hd81 Integrated Device Technology, 92hd81 Datasheet - Page 30
92hd81
Manufacturer Part Number
92hd81
Description
Single Chip Pc Audio System
Manufacturer
Integrated Device Technology
Datasheet
1.92HD81.pdf
(294 pages)
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SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
BTL/HP SD
MODE
BTL/HP SD INV
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
Control Flag
BTL SD
1.EAPD bit is set to one by default but the EAPD state is 0 after power-on reset because the function group is not in
0
0
0
0
0
0
0
0
1
1
HP SD
D0. The state after a single or double function group reset will be compliant with ECR15b.
1.EAPD bit is set to one by default but the EAPD state is 0 after power-on reset because the function group
0
0
0
0
0
0
0
0
1
1
0 = Amp will mute when disabled. (default) / 1 = Amp will shut down (enter a low power state) when disabled
0 = AMP will power down (or mute) when EAPD pin is low (default) / 1 = Amp will power down (or mute) when EAPD
pin is high.
is not in D0. The state after a single or double function group reset will be compliant with ECR15b.
BTL SD
MODE
0
0
0
0
1
1
1
1
0
1
HP SD
MODE
0
0
0
0
1
1
1
1
0
1
BTL SD INV
NA
NA
HP SD INV
0
0
1
1
0
0
1
1
Table 9. Headphone Amp Enable Configuration
NA
NA
0
0
1
1
0
0
1
1
EAPD Pin
State
Table 8. BTL Amp Status
NA
NA
EAPD Pin
0
1
0
1
0
1
0
1
State
NA
NA
0
1
0
1
0
1
0
1
Amplifier follows pin/function group power state and will enter a
Amplifier follows pin/function group power state and will mute
30
Amplifier follows pin/function group power state and will
Amplifier follows pin/function group power state and will
Description
enter a low power state when disabled
Amplifier is in a low power state
Amplifier is in a low power state
Amplifier is in a low power state
Amplifier is in a low power state
low power state when disabled
Amplifier is mute (default
Amplifier is mute (default
Headphone Amp State
mute when disabled
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is active
Amplifier is mute
Amplifier is mute
when disabled
Amp State
92HD81
1
1
)
)
PC AUDIO
V 0.97 01/09
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