Register Descriptions; Lcd Port Control Register (Lpcr) - Renesas H8/3847R Series Hardware Manual

Section 13 LCD Controller/Driver
13.2

Register Descriptions

13.2.1

LCD Port Control Register (LPCR)

Bit 7
DTS1
Initial value 0
Read/Write 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 Bit 6
DTS1 DTS0
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Rev. 6.00 Aug 04, 2006 page 434 of 680
REJ09B0145-0600
6 5
DTS0 CMX
0 0
R/W R/W
Bit 5
CMX Duty Cycle
0 Static
1
0 1/2 duty
1
0 1/3 duty
1
0 1/4 duty
1
4 3
SGX SGS3
0 0
R/W R/W
Common
Drivers Notes
COM Do not use COM
1
(initial value) COM
COM to COM COM
4 1
the same waveform as COM
COM to COM Do not use COM
2 1
COM to COM COM
4 1
as COM
same waveform as COM
COM to COM Do not use COM
3 1
COM to COM Do not use COM
4 1
COM to COM —
4 1
2 1
SGS2 SGS1 SGS0
0 0
R/W R/W R/W
, COM , and
4 3
.
2
, COM , and COM
4 3 2
and COM
4
outputs the same waveform
4
, and COM outputs the
3 2
.
1
.
4
.
4
0
0
output
.
1
.
3