MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Internal signal
LCDCK timing
1/4 duty
COM0
COM1
COM2
COM3
SEG0
Voltage level
VL3
VL2=VL1
VSS
VL3
VSS
OFF
ON
OFF
ON
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
1/3 duty
COM0
COM1
COM2
SEG0
ON
OFF
ON
OFF
ON
OFF
1/2 duty
COM0
COM2
COM1
COM0
COM2
COM1
COM0 COM2
COM0
COM1
SEG0
ON
OFF ON
OFF ON
OFF ON
OFF
COM1 COM0 COM1 COM0 COM1 COM0 COM1 COM0
Fig. 42 LCD drive waveform (1/2 bias)
VL3
VL2=VL1
VSS
VL3
VSS
VL3
VL2=VL1
VSS
VL3
VSS
39