Datasheet

Section 21 LCD Controller/Driver
Rev. 2.00 Jul. 04, 2007 Page 458 of 692
REJ09B0309-0200
21.3.1 LCD Port Control Register (LPCR)
LPCR selects the duty cycle, LCD driver, and pin functions.
Bit Bit Name
Initial
Value
R/W Description
7
6
5
DTS1
DTS0
CMX
0
0
0
R/W
R/W
R/W
Duty Cycle Select 1 and 0
Common Function Select
The combination of DTS1 and DTS0 selects static, 1/2,
1/3, or 1/4 duty. CMX specifies whether or not the
same waveform is to be output from multiple pins to
increase the common drive power when not all
common pins are used due to the selected duty.
For details, see table 21.2.
4 — 1 — Reserved
This bit is always read as 1 and cannot be modified.
3
2
1
0
SGS3
SGS2
SGS1
SGS0
0
0
0
0
R/W
R/W
R/W
R/W
Segment Driver Select 3 to 0
Select the segment drivers to be used.
For details, see table 21.3.
Table 21.2 Duty Cycle and Common Function Selection
Bit 7:
DTS1
Bit 6:
DTS0
Bit 5:
CMX Duty Cycle Common Drivers Notes
0 0 0 Static COM1 Do not use COM4, COM3, and
COM2
1 COM4 to COM1 COM4, COM3, and COM2
output the same waveform as
COM1
1 0 1/2 duty COM2 to COM1 Do not use COM4 and COM3
1 COM4 to COM1 COM4 outputs the same
waveform as COM3, and COM2
outputs the same waveform as
COM1
1 0 0 1/3 duty COM3 to COM1 Do not use COM4
1 COM4 to COM1 Do not use COM4
1 x 1/4 duty COM4 to COM1 —
[Legend]
x: Don't care