2
MMD24S
MMD24B
27
COM0
OUT
Common data signal.
Connected to LCD signal C4.
28
VL3
IN
Connected VC (+5V).
29 - 3
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 P0-
P7 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
P2
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 P2.
36
P20
IN
Signal similar to P23.
When any one of J- line keys on key matrix is touched, a corresponding signal will be
input into P20.
37
P7
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-2 line key on matrix is touched.
38
P6
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J- line key on matrix is touched.
39
P5
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P20 - P23 terminal while
one of J-0 line key on matrix is touched.
40
P4
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.
4
P3
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
P2
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
P
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
P0
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).
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
46
P06
OUT
Stirrer motor driving signal.
To turn on and off relay(RY3).
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
Pin No.
Signal
I/O
Description
ON
OFF
L: GND
H: +5V
ON
OFF
L: GND
H: +5V
