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S3C80A5B
PIN DESCRIPTIONS
Pin
Pin
Names
Type
P0.0–P0.7
I/O
P1.0–P1.7
I/O
P2.0
I/O
P2.1
P2.2
X
, X
–
IN
OUT
TEST
I
V
–
DD
V
–
SS
Table 1-1. Pin Descriptions
Pin
Description
I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors are assignable by
software. Pins can be assigned individually
as external interrupt inputs with noise filters,
interrupt enable/ disable, and interrupt
pending control. Interrupt with Reset(INTR)
is assigned to Port 0.
I/O port with bit-programmable pins.
Configurable to input mode or output mode.
Pin circuits are either push-pull or n-channel
open-drain type. Pull-up resistors are
assignable by software.
3-bit I/O port with bit-programmable pins.
Configurable to input mode, push-pull
output mode, or n-channel open-drain
output mode. Input mode with pull-up
resistors are assignable by software. The
two pins of port 2 have high current drive
capability.
System clock input and output pins
Test signal input pin (for factory use only;
must be connected to V
Power supply input pin
Ground pin
).
SS
PRODUCT OVERVIEW
Circuit
24-Pin
Type
Number
1
5–12
2
13–20
3
21–23
4
5
–
2, 3
–
4
–
24
–
1
Shared
Functions
INT0 – INT4/INTR
REM/T0CK
–
–
–
–
1-5
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