
PRODUCT OVERVIEW
S3C9654/C9658/P9658
1-6
Table 1-1. Signal Descriptions
Pin Names
Pin
Type
Pin Description
Circuit
Number
Pin
Numbers
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Pins
P0.0
I/O
Bit-programmable I/O port for Schmitt trigger
input or n-ch open drain output (50 mA).
Pull-up resistor is assignable to input pin by
software and is automatically disabled for
output pin. Port 0 can be individually configured
as external interrupt input.
SK
3
INT0
P0.1–P0.5
I/O
Bit-programmable I/O port for Schmitt trigger
input or push-pull output. Pull-up resistors
individually assignable to input pins by software
and are automatically disabled for output pins.
Port 0 can be individually configured as
external interrupt inputs.
D
1, 10, 11,
12, 20
INT0
P1.0–P1.5
I/O
Bit-programmable I/O port for Schmitt trigger
input or push-pull output. Pull-up resistors are
individually assignable to input pins by
software. Port 1 can be configured as
comparator input or external interrupt inputs.
Pull-down resistors are individually assignable.
(in comparator input)
CP
4–9
CIN0-5
INT1
P2.0/D-
–
P2.1/D+
I/O
Bit-programmable I/O port for Schmitt trigger
input or n-ch open drain output. Pull-up
resistors are individually assignable to input
pins by software and are automatically disabled
for output pins. Port 2 can be individually
configured as external interrupt inputs. Also it
can be configured as an USB ports.
CP
17, 18
INT2
X
OUT, XIN
–
System clock input and output pin
(crystal/ceramic oscillator, or external clock
source)
–
14, 15
–
INT0
I
External interrupt for bit-programmable port 0
D
1, 3, 10,
11, 12, 20
Port 0
INT1
I
External interrupt for bit-programmable port 1
D
4–9
Port 1
INT2
I
External interrupt for bit-programmable port 2
D
17, 18
Port 2
V
DD
–
Power input pin
–
19
–
V
SS
–
V
SS is a ground power for CPU core.
–
2
–
RESET
1
Reset input pin (Pull-up register embedded)
–
16
–