S3C9004/P9004/C9014/P9014 PRODUCT OVERVIEW
1-5
PIN DESCRIPTIONS
Table 1-1. S3C9004/P9004/C9014/P9014 Pin Descriptions
Pin
Names Pin
Type Pin
Description Circuit
Number Pin
Numbers Share
Pins
P0.0-P0.7 I/O Bit-programmable I/O port for Schmitt trigger
input or open-drain output. Port0 can also be
configured as external interface address lines A8-
A12.
C36-29 A8-A12
P1.0-P1.7 I/O Bit-programmable I/O port for Schmitt trigger
input, push-pull, or open-drain output. Port1 can
alternatively be used as external interface
address/data lines AD0-AD7.
C23-16 AD0-AD7
P2.0-P2.7 I/O Bit-programmable I/O port for Schmitt trigger
input or push-pull output. Port2 can be
individually configured as external interrupt
inputs. Especially, P2.0-2.3 can be configured for
external bus control signal.
D6-13 INT, AS,
DS, R/W,
DM
P3.0-P3.3 I/O Same general characteristics as Port1. Port3 are
designed for to drive LED directly. P3.3 can be
used to system clock output (CLO) port.
C1, 40-38 P3.3/CLO
P4.0-P4.3 I/O Bit-programmable I/O port. Input mode or n-
channel open-drain output mode is software
assignable. Port4 can be individually configured
as external interrupt inputs. Pull-up resistors are
also software assignable. Especially, P4.1 can be
used T0CLK input and P4.3 also T0OUT for
Timer 0.
D2-5 INT,
T0CLK,
T0OUT
XIN, XOUT –System clock input and output pin (for RC
oscillator, crystal/ceramic oscillator, or external
clock source)
–27, 28 –
INT IExternal interrupt for bit-programmable port2 and
port4 pins when set to input mode. –2-13 PORT2/
PORT4
RESET IRESET signal input pin. Schmitt trigger input with
internal pull-up resistor. A26 –
EA IExternal Memory Access (EA) pin with 2 modes:
0V = Normal Operation Mode
5V = ROMLESS Operation Mode
(Must be connected to VSS during normal
operation mode)
B24 –
VDD –Power input pin – 37 –
VSS1, VSS2 –Vss1 is a ground power for CPU core.
Vss2 is a ground power for I/O and OSC block –15, 25 –
NC –No connection
(This pin would be better connecting to VSS)– 14 –