S3P9014 datasheet(5/26 Pages) SAMSUNG

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S3C9004/P9004/C9014/P9014

PRODUCT OVERVIEW

1-5

PIN DESCRIPTIONS

Table 1-1. S3C9004/P9004/C9014/P9014 Pin Descriptions

Names

Type

Description

Circuit

Number

Numbers

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.

36-29

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.

23-16

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.

6-13

INT,

AS,

DS, R/W,

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.

1, 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.

2-5

INT,

T0CLK,

T0OUT

IN, XOUT

–

System clock input and output pin (for RC

oscillator, crystal/ceramic oscillator, or external

clock source)

–

27, 28

–

INT

External interrupt for bit-programmable port2 and

port4 pins when set to input mode.

–

2-13

PORT2/

PORT4

RESET

RESET signal input pin. Schmitt trigger input with

internal pull-up resistor.

–

External Memory Access (EA) pin with 2 modes:

0V = Normal Operation Mode

5V = ROMLESS Operation Mode

(Must be connected to V

SS during normal

operation mode)

–

VDD

–

Power input pin

–

SS1, VSS2

–

Vss1 is a ground power for CPU core.

Vss2 is a ground power for I/O and OSC block

–

15, 25

–

No connection

(This pin would be better connecting to V

SS)

–

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