
Pin Assignment
Pin Description
Pin Name
I/O
Description
PA0~PA7
I/O
Bidirectional 8-bit input/output port. Each bit can be configured as a wake-up input by a
configuration option. Software instructions determine if the pin is a CMOS output or Schmitt
trigger input with or without a pull-high resistor (by configuration option).
AVDD2
Audio power amplifier positive power supply
ROUT
O
Right driver analog output
LOUT
O
Left driver analog output
AVSS2
Audio power amplifier negative power supply, ground
AVSS1
Audio DAC negative power supply, ground
BIAS
A capacitor should be connected to ground to increase half-supply stability
MUSIC_IN
I
Power amplifier signal source if register bit SELW = 1 . The analog signal input will amplify by
the power amp then output to ROUT and LOUT at the same time.
AVDD1
Audio DAC positive power supply
AVDD3
ADC positive power supply
VAGRef
O
ADC analog ground reference voltage (should left open or connect a bypass capacitor
(Ex:100 pF) to ground)
VAG
O
ADC analog ground voltage (should connect a bypass capacitor (Ex:1 uF) to ground)
TI+
I
OP AMP non-inverting input
TI-
I
OP AMP inverting input
TG
O
OP AMP gain setting output
HT82A832R
Rev. 1.00
3
July 18, 2006
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