Datasheet

Section 13 LCD Controller/Driver
Rev. 6.00 Aug 04, 2006 page 434 of 680
REJ09B0145-0600
13.2 Register Descriptions
13.2.1 LCD Port Control Register (LPCR)
Bit
Initial value
Read/Write
7
DTS1
0
R/W
6
DTS0
0
R/W
5
CMX
0
R/W
4
SGX
0
R/W
3
SGS3
0
R/W
0
SGS0
0
R/W
2
SGS2
0
R/W
1
SGS1
0
R/W
LPCR is an 8-bit read/write register which selects the duty cycle and LCD driver pin functions.
LPCR is initialized to H'00 upon reset.
Bits 7 to 5: Duty cycle select 1 and 0 (DTS1, DTS0), common function select (CMX)
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 because of the duty setting.
Bit 7
DTS1
Bit 6
DTS0
Bit 5
CMX Duty Cycle
Common
Drivers Notes
0 0 0 Static COM
1
(initial value)
Do not use COM
4
, COM
3
, and
COM
2
.
001 COM
4
to COM
1
COM
4
, COM
3
, and COM
2
output
the same waveform as COM
1
.
0 1 0 1/2 duty COM
2
to COM
1
Do not use COM
4
and COM
3
.
011 COM
4
to COM
1
COM
4
outputs the same waveform
as COM
3
, and COM
2
outputs the
same waveform as COM
1
.
1 0 0 1/3 duty COM
3
to COM
1
Do not use COM
4
.
101 COM
4
to COM
1
Do not use COM
4
.
1 1 0 1/4 duty COM
4
to COM
1
—
111