S3C9454B View Datasheet(PDF) - Samsung
Part Name
Description
MFG CO.
'S3C9454B' PDF : 199 Pages View PDF
CONTROL REGISTERS
S3C9454B/F9454B
P1CON — Port 1 Control Register
E9H
Bit Identifier
RESET Value
Read/Write
.7
.6
.5
0
0
–
R/W
R/W
–
.4
.3
.2
.1
.0
–
0
0
0
0
–
R/W
R/W
R/W
R/W
.7
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
.6
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
.5–.4
Not used for S3C9454B/F9454B
.3–.2
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
.1–.0
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
NOTE: When you use external oscillator, P1.0, P1.1 must be set to output port to prevent current consumption.
4-12
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