Samsung 8-Bit CMOS Microcontroller, S3C9228/P9228 user manual LCD Port Control Register

S3C9228/P9228 LCD CONTROLLER/DRIVER

LCD PORT CONTROL REGISTER

The LCD port control register LPOT is used to control LCD signal pins or normal I/O pins. Following a RESET, a LPOT values are cleared to "0".

LCD Port Control Register

D8H, R/W

	MSB	.7	.6	.5	.4	.3		.2		.1		.0	LSB
	Not used										SEG0/P2.1 selection bit:
											0 = SEG port
											1 = Normal I/O port
SEG4-SEG19 and COM0-COM3 selection bits:
									SEG1/P2.0 selection bit:
000	= P4.0-P6.3: LCD signal pins
001	= P4.0-P4.3: Normal I/O, P4.4-P6.3: LCD signal pins								0 = SEG port
010	= P4.0-P4.7: Normal I/O, P5.0-P6.3: LCD signal pins								1 = Normal I/O port
011	= P4.0-P5.3: Normal I/O, P5.4-P6.3: LCD signal pins
							SEG2/P3.1 selection bit:
100	= P4.0-P5.7: Normal I/O, P6.0-P6.3: LCD signal pins
101	= P4.0-P6.3: Normal I/O						0 = SEG port
110	= Not available						1 = Normal I/O port
111	= Not available

SEG3/P3.0 selection bit: 0 = SEG port

1 = Normal I/O port

Figure 13-5. LCD Port Control Register

13-5