S1C63657

4

EPSON

■ PIN DESCRIPTION

Pin name

Pad No.

I/O

Function

25, 67

–

Power (+) supply pin

32, 94

–

Power (–) supply pin

21

–

12

–

29

–

Internal logic system regulated voltage output pin

24

–

26

–

Oscillation system regulated voltage output pin

6–8

–

LCD system power supply pin

CA, CB

4, 5

–

LCD system voltage booster capacitor connecting pin

CC, CD

22, 23

–

Voltage halver capacitor connecting pin

OSC1

27

I

Crystal oscillation input pin

OSC2

28

O

Crystal oscillation output pin

OSC3

30

I

Ceramic or CR oscillation input pin (selected by mask option)

OSC4

31

O

Ceramic or CR oscillation output pin (selected by mask option)

K00–K03

68–71

I

Input port pins

K10–K13

72–75

I

Input port pins

P00–P03

76–79

I/O

I/O port pins

P10–P13

80–83

I/O

I/O port pins

R00

84

O

Output port pin

R01

85

O

Output port pin

R02

86

O

Output port or TOUT output pin (selected by software)

R03

87

O

Output port or FOUT output pin (selected by software)

R10–R13

88–91

O

Output port pins

COM0–COM7

123, 1–3, 63–66

O

LCD common output pin (1/4, 1/5 or 1/8 duty is selectable by software)

SEG0–SEG55

95–122, 35–62

O

LCD segment output pin

SEN0

17

O

R/f converter Ch. 0 CR oscillation output pin

SEN1

19

O

R/f converter Ch. 1 CR oscillation output pin

REF0

16

O

R/f converter Ch. 0 reference resistor CR oscillation output pin

REF1

18

O

R/f converter Ch. 1 reference resistor CR oscillation output pin

HUD

20

O

R/f converter AC-bias oscillation output pin for humidity sensor

RFIN0

14

I

R/f converter Ch. 0 CR oscillation input pin

RFIN1

15

I

R/f converter Ch. 1 CR oscillation input pin

RFOUT

13

O

R/f converter oscillation frequency output pin

BZ

92

O

Sound output pin

BZ

____

93

O

Sound inverted output pin

RESET

34

I

Initial reset input pin

TEST

33

I

Testing input pin