Casio CE-250 Service Manual

— 10 —
Pin No. Signal Description In/Out
Status of
Power On
Status of
Power OFF
1 SW1 Not used (GND) — GND GND
2 SW2 Not used (GND) — GND GND
3 SW3 Not used (GND) — GND GND
4 SW4 Not used (GND) — GND GND
5 DOUT Data out signal to CPU Out High High
6 DIN Data in signal from CPU In Pulse High
7 VSS GND — GND GND
8 CLK Clock signal (CLK) In Pulse High
9 STB Data strobe signal (STB) In Pulse High
10 KEY1 Not used — — —
11 KEY2 Not used — — —
12 KEY3 Drawer sensor signal (DRW.S) In High High
13 KEY4 VCC — 5 V 5 V
14 VDD VCC — 5 V 5 V
15 SEG1 Display segment signal (Sa) Out Pulse Low
16 SEG2 Display segment signal (Sb) Out Pulse Low
17 SEG3 Display segment signal (Sc) Out Pulse Low
18 SEG4 Display segment signal (Sd) Out Pulse Low
19 SEG5 Display segment signal (Se) Out Pulse Low
20 SEG6 Display segment signal (Sf) Out Pulse Low
21 SEG7 Display segment signal (Sg) Out Pulse Low
22 SEG8 Display segment signal (Sdp) Out Pulse Low
23 SEG9 Display segment signal (Str) Out Pulse Low
24 SEG10 Display segment common signal (Scom) Out Pulse Low
25 SEG11 Not used Low Low
26 SEG12 Not used Low Low
27 VEE Power for display (-VN) — -32 V -32 V
28 GRD10 Display digit signal (G10) Out Pulse Low
29 GRD9 Display digit signal (G9) Out Pulse Low
30 GRD8 Display digit signal (G8) Out Pulse Low
31 GRD7 Display digit signal (G7) Out Pulse Low
32 GRD6 Display digit signal (G6) Out Pulse Low
33 GRD5 Display digit signal (G5) Out Pulse Low
34 GRD4 Display digit signal (G4) Out Pulse Low
35 GRD3 Display digit signal (G3) Out Pulse Low
36 GRD2 Display digit signal (G2) Out Pulse Low
37 GRD1 Display digit signal (G1) Out Pulse Low
38 VDD VCC — 5 V 5 V
39 LED4 Not used — Pulse Low
40 LED3 Not used — Pulse Low
41 LED2 Not used — Pulse Low
42 LED1 Not used — Pulse Low
43 VSS GND — GND GND
44 OSC S
y
stem clock
(
500 KHz
)
In Pulse Pulse
5-3. Display controller (uPD16312GB-3B4)

Casio CE-250 Specifications

General

Brand	Casio
Model	CE-250
Category	Cash Register
Language	English