Casio CE-300 Service Manual

Also see for CE-300 (EX-247): Service manual Most important functions

Casio CE-300 Service Manual Manual pdf 9 page image

— 7 —Pin No. Signal Description In/Out Status ofPower OnStatus ofPower OFF1 SW1 Not used (GND) — GND GND2 SW2 Not used (GND) — GND GND3 SW3 Not used (GND) — GND GND4 SW4 Not used (GND) — GND GND5 DOUT Data out signal to CPU Out High High6 DIN Data in signal from CPU In Pulse High7 VSS GND — GND GND8 CLK Clock signal (CLK) In Pulse High9 STB Data strobe signal (STB) In Pulse High10 KEY1 Not used — — —11 KEY2 Not used — — —12 KEY3 Drawer sensor signal (DRW.S) In High High13 KEY4 VCC — 5 V 5 V14 VDD VCC — 5 V 5 V15 SEG1 Display segment signal (Sa) Out Pulse Low16 SEG2 Display segment signal (Sb) Out Pulse Low17 SEG3 Display segment signal (Sc) Out Pulse Low18 SEG4 Display segment signal (Sd) Out Pulse Low19 SEG5 Display segment signal (Se) Out Pulse Low20 SEG6 Display segment signal (Sf) Out Pulse Low21 SEG7 Display segment signal (Sg) Out Pulse Low22 SEG8 Display segment signal (Sdp) Out Pulse Low23 SEG9 Display segment signal (Str) Out Pulse Low24 SEG10 Display segment common signal (Scom) Out Pulse Low25 SEG11 Not used Low Low26 SEG12 Not used Low Low27 VEE Power for display (-VN) — -32 V -32 V28 GRD10 Display digit signal (G10) Out Pulse Low29 GRD9 Display digit signal (G9) Out Pulse Low30 GRD8 Display digit signal (G8) Out Pulse Low31 GRD7 Display digit signal (G7) Out Pulse Low32 GRD6 Display digit signal (G6) Out Pulse Low33 GRD5 Display digit signal (G5) Out Pulse Low34 GRD4 Display digit signal (G4) Out Pulse Low35 GRD3 Display digit signal (G3) Out Pulse Low36 GRD2 Display digit signal (G2) Out Pulse Low37 GRD1 Display digit signal (G1) Out Pulse Low38 VDD VCC — 5 V 5 V39 LED4 Not used — Pulse Low40 LED3 Not used — Pulse Low41 LED2 Not used — Pulse Low42 LED1 Not used — Pulse Low43 VSS GND — GND GND44 OSC System clock (500 KHz) In Pulse Pulse4-3. Display controller (uPD16312GB-3B4)www.freeservicemanuals.info3/22/15Digitized in Heiloo, Holland.