HD6432646 Hitachi, HD6432646 Datasheet - Page 668

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

18.2
18.2.1
LPCR is an 8-bit read/write register which selects the duty cycle, LCD driver, and pin functions.
LPCR is initialized to H'00 upon reset and in standby mode.
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
1
Note: COM4 to COM1 function as ports when the setting of SGS3 to SGS0 is 0000 (initial value).
Bit 4—Reserved: This bit is always read as 0 and should only be written with 0.
634
Bit
Initial value
Read/Write
Bit 6:
DTS0
0
1
0
1
Register Descriptions
LCD Port Control Register (LPCR)
DTS1
Bit 5:
CMX
0
1
0
1
0
1
*
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
COM1
COM4 to COM1
COM2 to COM1
COM4 to COM1
COM3 to COM1
COM4 to COM1
COM4 to COM1
—
—
4
0
SGS3
R/W
3
0
Notes
COM4, COM3, and COM2 can
be used as ports
COM4, COM3, and COM2 output
the same waveform as COM1
COM4 and COM3 can be used
as ports
COM4 outputs the same
waveform as COM3, and COM2
outputs the same waveform as
COM1
COM4 can be used as a port
Do not use COM4
—
SGS2
R/W
2
0
SGS1
R/W
1
0
(Initial value)
*: Don’t care
SGS0
R/W
0
0