
31
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C3 Group
Internal
signal
LCDCK
timing
1/4 duty Voltage level
V
L3
V
L2
=V
L1
V
SS
V
L3
V
SS
COM
0
COM
1
COM
2
COM
3
SEG
0
OFF ON OFF ON
COM
3
COM
2
COM
1
COM
0
COM
3
COM
2
COM
1
COM
0
1/3 duty
V
L3
V
L2
=V
L1
V
SS
V
L3
V
SS
OFFON ON OFF ON OFF
1/2 duty
COM
0
COM
1
COM
2
SEG
0
COM
0
COM
1
SEG
0
V
L3
V
L2
=V
L1
V
SS
V
L3
V
SS
OFFON OFFON OFFON OFFON
COM
0
COM
2
COM
1
COM
0
COM
2
COM
1
COM
0
COM
2
COM
1
COM
0
COM
1
COM
0
COM
1
COM
0
COM
1
COM
0
1/1 duty (1/1 bias)
COM
0
SEG
0
V
L3
V
L2
=V
L1
=V
SS
V
L3
V
SS
ONOFF
Fig. 31 LCD drive waveform (1/2 bias)
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