Casio CTK-711EX User Manual download pdf (Page 20)

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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.

POWER AMPLIFIER (IC301: LA4620)

The power amplifier is a two-channel amplifier with standby switch.

16 2 10 11 13

Pre-drive

Amp.

Input

Amp.

Power

Amp.

–

Pre-drive

Amp.

Input

Amp.

Power

Amp.

–

Input

Amp.

Pre-drive

Amp.

Power

Amp.

–

Input

Amp.

Pre-drive

Amp.

Power

Amp.

RL Short

Protector

RL Short

Protector

Terminal

Protection

Circuit

Pop Noise

Prevention

Circuit

Ripple

Filter

IN11+

IN11–

IN12–

IN21+

IN21–

IN22–

NC DC MUTE ADJ

Boot11

OUT11

PoGND1

OUT12

Boot12

VCC1

Boot21

OUT21

PoGND2

OUT22

Boot22

VCC2

PriGND

Pin No. Terminal In/Out Function

1 SEL In Mode selection terminal. Connected to ground.

2 D.GND In Ground (0 V) source for internal digital circuit

3 NC Not used.

4 DVDD In +5 V source for internal digital circuit

5 A.GND In Ground (0 V) source for internal analog circuit

6 R.OUT Out Sound waveform output

7 A.VDD In +5 V source for internal analog circuit

8 A.VDD In +5 V source for internal analog circuit

9 R.REF In Reference voltage terminal. Connected to a capacitor.

10 L.REF In Reference voltage terminal. Connected to a capacitor.

11 L.OUT Out Left channel sound waveform output

12 A.GND In Ground (0 V) source for internal analog circuit

13 LRCK In Word clock (L/R separation signal) input.

14 LRSEL In Not used. Connected to ground.

15 SI In Sound data input

16 CLK In Bit clock input

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 36 37

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Casio CTK-711EX User Manual Page 20

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