hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 347

• Manufacturer Part Number: hd66100
• Description: H8/3867 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.
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
0
0
1
1
332
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
to COM
to COM
to COM
to COM
to COM
SGX
R/W
4
0
1
1
1
1
1
1
SGS3
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
—
SGS2
2
4
4
R/W
.
, COM
outputs the same waveform
2
0
3
, and COM
3
, and COM
SGS1
R/W
4
4
4
4
1
0
, COM
.
.
and COM
2
outputs the
3
SGS0
2
1
, and
.
R/W
output
0
0
3
1
.
.