Samsung S3C84I8 User Manual page 31

PRODUCT OVERVIEW
1-10
Pull-up
Enable
Data
Output
Disable
Figure 1-6. Pin Circuit Type D
Port Data
Alternative output
Output
Disable
Ext.INT
Normal
Input
Figure 1-7. Pin Circuit Type D-5 (P1.0–P1.3)
V
DD
Pin Circuit
I/O
Type C
V
V
DD
M
U
Pin
X
Circuit
Type C
Noise
Filter
S3C84I8/F84I8/C84I9/F84I9
DD
Pull-up
enable
I/O