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CONTROL REGISTERS
P1CON
— Port 1 Control Register
Bit Identifier
RESET Value
Read/Write
.7
.6
.5–.4
.3–.2
.1–.0
NOTE: When you use external oscillator, P1.0, P1.1 must be set to output port to prevent current consumption.
4-12
.7
.6
0
0
R/W
R/W
Part 1.1 N-channel open-drain Enable Bit
0
Configure P1.1 as a push-pull output
1
Configure P1.1 as a n-channel open-drain output
Port 1.0 N-channel open-drain Enable Bit
0
Configure P1.0 as a push-pull output
1
Configure P1.0 as a n-channel open-drain output
Not used for S3C9454B/F9454B
Port 1, P1.1 Interrupt Pending Bits
0
0
Schmitt trigger input;
0
1
Schmitt trigger input; pull-up enable
1
0
Output
1
1
Schmitt trigger input; pull-down enable
Port 1, P1.0 Configuration Bits
0
0
Schmitt trigger input;
0
1
Schmitt trigger input; pull-up enable
1
0
Output
1
1
Schmitt trigger input; pull-down enable
.5
.4
.3
–
–
0
–
–
R/W
S3C9454B/F9454B
.2
.1
0
0
R/W
R/W
R/W
E9H
.0
0
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