hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 461

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

13.2
13.2.1
LPCR is an 8-bit read/write register which selects the duty cycle and LCD driver pin functions.
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
0
0
1
1
Bit 4—Reserved
Bit 4 is reserved. It can only be written with 0.
Bit
Initial value
Read/Write
Bit 6
DTS0
0
1
0
1
Register Descriptions
LCD Port Control Register (LPCR)
Bit 5
CMX
0
1
0
1
0
1
0
1
DTS1
R/W
7
0
Duty Cycle
Static
1/2 duty
1/3 duty
1/4 duty
DTS0
R/W
6
0
CMX
R/W
5
0
Common Drivers
COM
COM
COM
COM
COM
COM
COM
1
4
2
4
3
4
4
(initial value) Do not use COM
to COM
and COM
to COM
to COM
to COM
to COM


W
4
1
1
1
1
1
Rev. 7.00 Mar 10, 2005 page 419 of 652
SGS3
1
R/W
3
0
Notes
COM
COM
the same waveform as COM
Do not use COM
COM
as COM
same waveform as COM
Do not use COM
Do not use COM
—
Section 13 LCD Controller/Driver
SGS2
2
4
4
R/W
.
, COM
outputs the same waveform
2
0
3
, and COM
3
, and COM
SGS1
R/W
REJ09B0042-0700
4
4
4
4
1
0
, COM
.
.
and COM
2
outputs the
3
2
SGS0
1
, and
.
output
R/W
0
0
3
1
.
.