Samsung S3P80C5 User Manual page 29

PRODUCT OVERVIEW
CAOF(CACON.0)
Carrier On/Off (P2.5)
1-8
Pull-up
Enable
P2CON.1
Port 2.1 Data
Open-Drain
Output
Disable
P2.1 Input
T0CK
Figure 1-6. Pin Circuit Type 4 (P2.1)
Pull-up
Enable
Data
Open-drain
Output
Disable
Normal Input
Figure 1-7. Pin Circuit Type 5 (P2.2)
M
Data
U
X
Noise filter
V
DD
V
SS
S3P80C5/C80C5/C80C8
V
DD
Pull-up
Resistor
(Typical 21KΩ)
V
DD
P2.1/REM/T0CK
V
SS
V
DD
Pull-up Resistor
(Typical 21KΩ)
In/Out