Casio CTK-650 - page 22

MA0200941A

Contents

Main Page SPECIFICATION 2 BLOCK DIAGRAM CIRCUIT DESCRIPTION CPU(HD6433298A16P : H8/329) DIGITAL SIGNAL PROCESSOR, LSI-S (HG51A115A01FD) KEY TOUCH LSI(HG52E35P) POWER AMPLIFIER(LA4598) BUTTON MATRIX Nomenclature of Keys KEY MATRIX 9 WIRING DIAGRAM KI7 KI6 KI5 KI4 IC LEAD IDENTIFICATION AND INTERNAL CIRCUIT UPD6376CX (D/A converter) TC74HC174AP (HEX D-TYPE FLIP FLOP WITH CLEAR ) TC74HC08AP (QUAD 2-INPUT AND GATE) TC74HC00AP (QUAD 2-INPUT NAND GATE) Page PCB VIEW & MAJOR WAVEFORMS SCHEMATIC DIAGRAM 13