MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Internal signal
LCDCK timing
1/4 duty
COM0
COM1
COM2
COM3
SEG0
Voltage level
VVVVLLSL321S
VL3
VSS
OFF
ON
OFF
ON
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
1/3 duty
COM0
VVVLLL321
VSS
COM1
COM2
VL3
SEG0
VSS
ON
OFF
ON
OFF
ON
OFF
COM0 COM2 COM1 COM0 COM2 COM1 COM0 COM2
1/2 duty
COM0
VVVVLLSL321S
COM1
SEG0
VL3
VSS
ON
OFF ON
OFF ON
OFF ON
OFF
COM1 COM0
Fig. 43 LCD drive waveform (1/3 bias)
COM1
COM0
COM1
COM0
COM1
COM0
40