Signal
21

MMD24S

MMD24B

 

Pin No.

Signal

I/O

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

COM0

OUT

Common data signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Connected to LCD signal C4.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

VL3

IN

Connected VC (+5V).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29 - 31

P27- P25

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

SEG20

OUT

Segment data signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Connected to LCD segment S24.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

P23

IN

Signal coming from touch key.

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of J-4 line keys on key matrix is touched, a corresponding signal from P10-

 

 

 

 

P17 will be input into P23. When no key is touched, the signal is held at "L" level.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

P22

IN

Signal similar to P23.

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of J-3 line keys on key matrix is touched, a corresponding signal will be

 

 

 

 

input into P22.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

P21

IN

Signal similar to P23.

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of J-2 line keys on key matrix is touched, a corresponding signal will be

 

 

 

 

input into P21.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

P20

IN

Signal similar to P23.

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of J-1 line keys on key matrix is touched, a corresponding signal will be

 

 

 

 

input into P20.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37

P17

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-12 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38

P16

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-11 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

39

P15

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-10 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

P14

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-9 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

41

P13

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-8 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

P12

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-7 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

43

P11

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-6 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

44

P10

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while

 

 

 

 

one of J-5 line key on matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

P07

OUT

Fan motor (Drawer) driving signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

To turn on and off relay(RY4).

ON

 

 

 

H: +5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“H” level: During fan motor ON.

 

 

 

 

 

 

 

L: GND

 

 

 

 

“L” level: During fan motor OFF.

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

46

P06

OUT

Stirrer motor driving signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

To turn on and off relay(RY3).

ON

 

 

 

 

 

 

 

 

 

“H” level: During fan motor ON.

 

 

 

H: +5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“L” level: During fan motor OFF.

 

 

 

 

 

 

 

L: GND

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 21
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Sharp MMD24S, MMD24B manual Pin No, Description, Common data signal, Segment data signal, Signal coming from touch key