UPD78F0411GA-GAM-AX Datasheet, PDF (390/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 15 LCD CONTROLLER/DRIVER
(3) Output waveforms of common and segment signals
The voltages listed in Table 15-4 are output as common and segment signals.
When both common and segment signals are at the select voltage, a display on-voltage of ±VLCD is obtained.
The other combinations of the signals correspond to the display off-voltage.
Table 15-4. LCD Drive Voltage
Common Signal
VLC0/LVSS
(a) Static display mode
Segment Signal
Select Signal Level
LVSS/VLC0
–VLCD/+VLCD
Deselect Signal Level
VLC0/LVSS
0 V/0 V
(b) 1/2 bias method
Common Signal
Select signal level
Deselect signal level
Segment Signal
Select Signal Level
LVSS/VLC0
VLC0/LVSS
VLC1 = VLC2
–VLCD/+VLCD
1
1
– VLCD/+ VLCD
2
2
(c) 1/3 bias method
Common Signal
Segment Signal
Select Signal Level
LVSS/VLC0
Select signal level
Deselect signal level
VLC0/LVSS
VLC2/VLC1
–VLCD/+VLCD
1
1
– VLCD/+ VLCD
3
3
(d) 1/4 bias method
Common Signal
Segment Signal
Select Signal Level
VLC0/LVSS
Select signal level
Deselect signal level
LVSS/VLC0
VLC1/VLC3
+VLCD/–VLCD
1
1
+ VLCD/– VLCD
4
4
Deselect Signal Level
VLC0/LVSS
0 V/0 V
1
1
+ VLCD/– VLCD
2
2
Deselect Signal Level
VLC1/VLC2
1
1
– VLCD/+ VLCD
3
3
1
1
+ VLCD/– VLCD
3
3
Deselect Signal Level
VLC1/VLC2
1
1
+ VLCD/– VLCD
2
2
1
1
– VLCD/+ VLCD
4
4
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User’s Manual U18698EJ1V0UD