Display Controller (Ic2: Upd16312Gb-3B4) - Casio FE-700 MEX Service Manual

6-3. Display controller (IC2: uPD16312GB-3B4)

Pin No. Signal Description
1 SW1 Not used (GND)
2 SW2 Not used (GND)
3 SW3 Not used (GND)
4 SW4 Not used (GND)
5 DOUT Data out signal to CPU
6 DIN Data in signal from CPU
7 VSS GND
8 CLK Clock signal (CLK)
9 STB Data strobe signal (STB)
10 KEY1 2nd display sensor signal (D.TEST1)
11 KEY2 Peper near end sensor signal (PNES)
12 KEY3 Drawer sensor signal (DRW.S)
13 KEY4 VCC
14 VDD VCC
15 SEG1 Display segment signal (Sa)
16 SEG2 Display segment signal (Sb)
17 SEG3 Display segment signal (Sc)
18 SEG4 Display segment signal (Sd)
19 SEG5 Display segment signal (Se)
20 SEG6 Display segment signal (Sf)
21 SEG7 Display segment signal (Sg)
22 SEG8 Display segment signal (Sdp)
23 SEG9 Display segment signal (Str)
24 SEG10 Display segment common signal (Scom)
25 SEG11 Not used
26 SEG12 Not used
27 VEE Power for display (-VN)
28 GRD10 Display digit signal (G10)
29 GRD9 Display digit signal (G9)
30 GRD8 Display digit signal (G8)
31 GRD7 Display digit signal (G7)
32 GRD6 Display digit signal (G6)
33 GRD5 Display digit signal (G5)
34 GRD4 Display digit signal (G4)
35 GRD3 Display digit signal (G3)
36 GRD2 Display digit signal (G2)
37 GRD1 Display digit signal (G1)
38 VDD VCC
39 LED4 Not used
40 LED3 Not used
41 LED2 Not used
42 LED1 Not used
43 VSS GND
44 OSC System clock (500KHz)
— 11 —
Status of Status of
In/Out
Power On Power OFF
- GND
- GND
- GND
- GND
Out High
In Pulse
- GND
In Pulse
In Pulse
- Low
In High
In High
- 5V
- 5V
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Low
Low
- -32V
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
- 5V
- Pulse
- Pulse
- Pulse
- Pulse
- GND
In Pulse
GND
GND
GND
GND
High
High
GND
High
High
Low
High
High
5V
5V
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
-32V
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
5V
Low
Low
Low
Low
GND
Pulse