Samsung 8-Bit CMOS Microcontroller Microcassette Recorder User Manual


 
CONTROL REGISTERS S3C9228/P9228
4-12
LPOT LCD Port Control Register D8H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESETRESET Value
0 0 0 0 0 0 0
Read/Write
R/W R/W R/W R/W R/W R/W R/W
.7
Not used for S3C9228/P9228
.6-.4 SEG4-SEG19 and COM0-COM3 Selection Bit
SEG4-7 SEG8-11 SEG12-15 SEG16-19/
COM7-COM4
COM0-3
P4.0-P4.3 P4.4-P4.7 P5.0-P5.3 P5.4-P5.7 P6.0-P6.3
0 0 0 SEG SEG SEG SEG/COM COM
0 0 1 Port SEG SEG SEG/COM COM
0 1 0 Port Port SEG SEG/COM COM
0 1 1 Port Port Port SEG/COM COM
1 0 0 Port Port Port Port COM
1 0 1 Port Port Port Port Port
.3 SEG3/P3.0 Selection Bit
0 SEG port
1 Normal I/O port
.2 SEG2/P3.1 Selection Bit
0 SEG port
1 Normal I/O port
.1 SEG1/P2.0 Selection Bit
0 SEG port
1 Normal I/O port
.0 SEG0/P2.1 Selection Bit
0 SEG port
1 Normal I/O port
NOTE: SEG16-SEG19 are shared with COM4-COM7.