Technical information

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
OFFON ON OFF ON OFF
1/2 duty
COM
0
COM1
COM2
SEG0
COM0
COM1
SEG0
VL3
VL2=VL1
VSS
VL3
VSS
OFFON OFFON OFFON OFFON
COM0 COM2 COM1
COM0
COM2 COM1 COM0 COM2
COM1 COM0
COM1
COM0
COM1 COM0 COM1 COM0