IDT CONFIDENTIAL
37
V 0.987 11/09
2009 INTEGRATED DEVICE TECHNOLOGY, INC.
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.22.2.1. When Port E Aux Audio Out presence detect = 0
Presence detect for Port E = 0 (nothing plugged in)
Port F Aux Audio input is routed to Port A, B, or D when that port is active.
If either Port A or Port B is in use (port presence detect = 1), Port D, internal speakers, will be
inactive (off)
The power supply for Port A and B will be active if either A or B is in use but if only one of the two
ports is in use, the other may be turned off to save power.
If neither Port A nor Port B is in use (port presence detect = 0), Port D, internal speakers, will be
active and ports A and B will be inactive.
EAPD is used to indicate if AUX Audio Mode is in use.
2.22.2.2. When Port E Aux Audio Out presence detect = 1
Presence detect for Port E = 1 (something plugged in)
Port F Aux Audio input is routed to Ports A, B
Port D is disabled
If either Port A or Port B is in use (port presence detect = 1), that port will be enabled and output
the audio entering Port F.
The power supply for Port A and B will be active if either A or B is in use but if only one of the two
ports is in use, the other may be turned off to save power.
If neither Port A nor Port B is in use (port presence detect = 0), ports A and B will be inactive and
the audio on Port F will play through the dock using resources outside of the CODEC.
EAPD is used to indicate if AUX Audio Mode is in use.
Σ
vol
mute
vol
mute
vol
mute
Pin Complex
Pins 39/41/43/44
PORT D
-34.5 to +12 dB
In 1.5 dB steps
PORT F
Mic Bias
(Black River / Hendrix)
Boost
+0/+10/+20/+30 dB
LO
BTL
Pin Complex
Pins 17/18
Port C
Port E
Port F
Class-AB
Pin Complex
Pins 28/29
PORT A
HP
Pin Complex
Pins 31/32
PORT B
HP
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
MU
X
Σ
Analog Beep
Digital PC Beep
vol
mute
vol
mute
DAC0
Port A
DAC1
Vol
-46.5 to 0 dB
In 1.5 dB steps
mute
MixerOutVol
DAC1
MixerOutVol
DAC0
MU
X
DAC2
DAC1
MixerOutVol
DAC0
MU
X
DAC2
DAC1
MixerOutVol
DAC0
MU
X
DAC2
Mixer and output ports forced on.
Output sent to BTL amp by default but
changed to HP if presence detect
shows HP.
HP Jack
Internal
Speakers
Aux Audio In
(Disabled)
(Disabled if port A,
B, or E in use)