DAC (LSI1: UPD6376GS)
UPD6376GS is a two-channel 16-bit Digital to Analog Convertor consisting of resistor string, output ampli-
fier and zero offset circuit.
The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the
melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog
waveforms by each channel and output them separately.
Pin No.TerminalIn/OutFunction
1SELInMode selection terminal. Connected to ground.
2D.GNDInGround (0 V) source for internal digital circuit
3NCNot used.
4DVDDIn+5 V source for internal digital circuit
5A.GNDInGround (0 V) source for internal analog circuit
6R.OUTOutSound waveform output
7A.VDDIn+5 V source for internal analog circuit
8A.VDDIn+5 V source for internal analog circuit
9R.REFInReference voltage terminal. Connected to a capacitor.
10L.REFInReference voltage terminal. Connected to a capacitor.
11L.OUTOutLeft channel sound waveform output
12A.GNDInGround (0 V) source for internal analog circuit
13LRCKInWord clock (L/R separation signal) input.
14LRSELInNot used. Connected to ground.
15SIInSound data input
16CLKInBit clock input
POWER AMPLIFIER (IC301: LA4620)
The power amplifier is a two-channel amplifier with standby switch.
19Boot11
+
IN11+3
InputPre-drivePowerOUT11
20
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RL ShortPoGND1
21
Protector
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InputPre-drivePower
22OUT12
Amp.Amp.Amp.
+
23Boot12
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Ripple
ProtectionPrevention
PriGND6Filter1CircuitCircuitVCC1
18Boot21
IN21++9
InputPre-drivePowerOUT21
17
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RL Short
15PoGND2
Protector
IN22��8
InputPre-drivePowerOUT22
14
Amp.Amp.Amp.
+
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162101113
NCDCMUTEVCC2ADJ
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ACEC
PANASONIC
