MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Internal signal
LCDCK timing
1/4 duty
Voltage level
VL3
V
VL2
VSL1S
COM
0
COM
COM
COM
1
2
3
VL3
SEG
0
VSS
OFF
ON
OFF
ON
COM
3
COM3
COM
2
COM
1
COM
0
COM
2
COM
1
COM0
1/3 duty
VL3
VL2
VSL1S
V
COM
COM
COM
0
1
2
VL3
SEG
0
VSS
ON
OFF
ON
OFF
ON
OFF
COM
0
COM
2
COM
1
COM
0
COM2
COM
2
COM
1
COM0
1/2 duty
VL3
VL2
VSL1S
V
COM
COM
0
1
VL3
SEG
0
VSS
ON
OFF
ON
OFF
ON
OFF
ON
OFF
COM
1
COM
0
COM
1
COM
0
COM
1
COM0
COM
1
COM0
Fig. 43 LCD drive waveform (1/3 bias)
40