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35
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Fig. 27 LCD drive waveform (1/2 bias)
Internal logic
LCDCK timing
1/4 duty
Voltage level
VL3
VL2=VL1
VSS
VL3
VSS
COM0
COM1
COM2
COM3
SEG0
OFF
ON
OFF
ON
COM3
COM2
COM1
COM0
COM3
COM2
COM1
COM0
1/3 duty
VL3
VL2=VL1
VSS
VL3
VSS
OFF
ON
OFF
ON
OFF
1/2 duty
COM0
COM1
COM2
SEG0
COM0
COM1
SEG0
VL3
VL2=VL1
VSS
VL3
VSS
OFF
ON
OFF
ON
OFF
ON
OFF
ON
COM0
COM2
COM1
COM0
COM2
COM1
COM0
COM2
COM1
COM0
COM1
COM0
COM1
COM0
COM1
COM0