23 lCD DRiVeR (lCD)
23-4
Seiko epson Corporation
S1C17624/604/622/602/621 TeChniCal Manual
S1C17604/602/621
4.1.2 Drive Duty Settings (S1C17604/602/621)
Table 23.
lDuTY[2:0]
Duty
Valid COM pins
Valid SeG pins
Max. number of
display segments
0x7–0x5
Reserved
–
–
–
0x4
1/8
COM0 to COM7
SEG0 to SEG35
288 segments
0x3
1/4
COM0 to COM3
SEG0 to SEG39
160 segments
0x2
1/3
COM0 to COM2
SEG0 to SEG39
120 segments
0x1
1/2
COM0 to COM1
SEG0 to SEG39
80 segments
0x0
Static
COM0
SEG0 to SEG39
40 segments
(Default: 0x4)
The COM4/SEG39 to COM7/SEG36 pins are configured to COM pins when 1/8 duty is selected or SEG pins
when other duty is selected.
The drive bias is fixed at 1/3 (three potentials V
C1
, V
C2
, V
C3
) for all duty settings.
Drive Waveform
23.4.2
Figures 23.4.2.1 to 23.4.2.5 shows the drive waveforms according to the duty selections.