Hitachi H8S/2646 Hardware Manual page 988

LPCR—LCD Port Control Register
Bit 7
DTS1
Initial value 0
Read/Write R/W
Segment Driver Select (H8S/2646, H8S/2646R, H8S/2645)
Bit 3 Bit 2 Bit 1
SGS3 SGS2 SGS1 SGS0
0 0 0
1
1 0
1
1 * *
Note: When using external expansion, set a value of 0000 for SGS3 to SGS0. When the setting of SGS3
to SGS0 is 0000, COM4 to COM1 also function as ports.
Segment Driver Select (H8S/2648, H8S/2648R, H8S/2647)
Bit 3 Bit 2 Bit 1
SGS3 SGS2 SGS1 SGS0
0 0 0
1
1 0
1
1 * *
Note: When using external expansion, set a value of 0000 for SGS3 to SGS0. When the setting of SGS3
to SGS0 is 0000, COM4 to COM1 also function as ports.
Duty Cycle Select/Common Function Select
Bit 7 Bit 6 Bit 5
Duty Cycle
DTS1 DTS0 CMX
0 0 0 Static
1
1/2 duty
1 0
1
1/3 duty
1 0 0
1
1 1/4 duty
*
Note: COM4 to COM1 function as ports when the setting of SGS3 to SGS0 is 0000 (initial value).
956
6 5
DTS0 CMX
0 0
R/W R/W
Bit 0 Function of Pins SEG24 to SEG1
SEG24 to SEG16 to SEG12 to
SEG17 SEG13 SEG9
0
Port Port
Port
1 SEG
Port Port
0 SEG
SEG Port
1
SEG SEG
SEG
0
SEG SEG
SEG
1
SEG SEG
SEG
* Settting
Settting Settting
prohibited
prohibited prohibited
*
Settting Settting Settting
prohibited prohibited
prohibited
Bit 0 Function of Pins SEG40 to SEG1
SEG40 SEG32 SEG28
to to to
SEG33 SEG29 SEG25
0
Port Port Port
1
SEG Port Port
0 SEG SEG Port
1 SEG SEG SEG
0
SEG SEG SEG
1
SEG SEG SEG
0
SEG SEG SEG
1
SEG SEG SEG
0 SEG SEG SEG
1 SEG SEG SEG
Common Drivers
COM1 COM4, COM3, and COM2 can be used as ports (Initial value)
COM4 to COM1 COM4, COM3, and COM2 output the same waveform as COM1
COM2 to COM1 COM4 and COM3 can be used as ports
COM4 to COM1 COM4 outputs the same waveform as COM3, and COM2 outputs
the same waveform as COM1
COM3 to COM1 COM4 can be used as a port
COM4 to COM1 Do not use COM4
COM4 to COM1
H'FC30
4 3
— SGS3
0 0
— R/W
SEG8 to SEG4 to
SEG5 SEG1
Port Initial value (external
Port
expansion enabled)
Port External expansion
Port
not possible
Port
Port
Port
Port
Port
SEG
SEG SEG
Settting
Settting
prohibited
prohibited
Settting
Settting
prohibited prohibited
SEG24 SEG20 SEG16 SEG12
to to to to
SEG21 SEG17 SEG13 SEG9
Port Port Port Port
Port Port Port Port
Port Port Port Port
Port Port Port Port
SEG Port Port Port
SEG SEG Port Port
SEG SEG SEG Port
SEG SEG SEG SEG
SEG SEG SEG SEG
SEG SEG SEG SEG
—
2 1
SGS2 SGS1 SGS0
0 0
R/W R/W R/W
Notes
*: Don't care
SEG8 SEG4
to to
SEG5 SEG1
Initial value (external
Port Port
expansion enabled)
Port Port External expansion
not possible
Port Port
Port Port
Port Port
Port Port
Port Port
Port Port
SEG Port
SEG SEG
Notes
LCD
0
0
Notes
*: Don't care
*: Don't care