Specifications

— 22 —

Pin No. Name In/Out Status Status Description

of OFF of ON

10-7.Character generator ROM pin descriptions (HD62063B01)

24 EROUT Out 6V 5V VFB capacitor terminal

25 VFB ** H 3.2V EROUT signal input

26 MIN ** 5V 3.2V

27 MAX ** 5V 3.2V

28 U/D In H 5V Display contrast control signal (Up/Down)

29 CLOCK In L L Display contrast clock signal

30 SET In H H Display contrast data reset signal

31 PDB In L H

Pin No. Name In/Out Status Status Description

of OFF of ON

1,7~12,23 NC ** ** ** Not used

2 BLD In ** ** Not used (Battery voltage detection terminal)

3 VOSC In 3V ** Connected capacitor

4,20 GND In L L GND terminal

5,6 OSI/OSO In Pulse Pulse External clock terminal (32.768 KHz)

13 TNL Out ** ** Not used

14,19 IN1+,IN2+ In H H Connected to VDD

15,32 VSS1,VSS2 In L L GND terminal

16,21 IN1-,IN2- In H H Connected to VDD

17,22 OUT1,OUT2 Out ** ** Not used

18 TNH Out ** ** Not used

24 IN In L Pulse Power on key input terminal

25 OUT Out H Pulse KI0 terminal for power on

26,27 BZ1,2 Out L L Buzzer signal

28 INT Out H H Interrupt signal for alarm clock (alarm time----"L")

29,30 CEH,CEL Out H Pulse RAM chip select signal

31 CED In H Pulse Chip enable signal of CPU

33 EN In L H Enable signal (Buzzer off-----"L")

34~37 IO3~IO0 In/Out L Pulse Data bus line (IO0~IO3)

38~42 A0~A3,A15 In L Pulse Address bus line (A0~A3,A15)

43 WEB In H Pulse Write signal

44 CSB In H Pulse Chip select signal

Power

H H

VDD terminal

Power