Samsung S3C9228/P9228, 8-Bit CMOS Microcontroller user manual P1CON Port 1 Control Register

CONTROL REGISTERSS3C9228/P9228

P1CON – Port 1 Control Register EFH

Bit Identifier

RESET Value

Read/Write

.7-.6

.7	.6	.5	.4	.3	.2	.1	.0
0	0	0	0	0	0	0	0
R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
P1.3/AD3/INT Configuration Bits
0 0	Schmitt trigger input

01 Push-pull output

10 N-channel open-drain output

1 1 Alternative function (ADC mode)

.5-.4	P1.2/AD2/INT Configuration Bits
	0	0	Schmitt trigger input
	0	1	Push-pull output
	1	0	N-channel open-drain output
	1	1	Alternative function (ADC mode)

.3-.2	P1.1/AD1/INT Configuration Bits
	0	0	Schmitt trigger input
	0	1	Push-pull output
	1	0	N-channel open-drain output
	1	1	Alternative function (ADC mode)

.1-.0	P1.0/AD0/INT Configuration Bits
	0	0	Schmitt trigger input
	0	1	Push-pull output
	1	0	N-channel open-drain output
	1	1	Alternative function (ADC mode)

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