S3C7238 datasheet(6/36 Pages) SAMSUNG

Part #	S3C7238

Description	The S3C7238/C7235 single-chip CMOS microcontroller has been designed for high performance using Samsungs newest 4-bit CPU core, SAM47 (Samsung Arrange

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Manufacturer	SAMSUNG [Samsung semiconductor]

Direct Link	http://www.samsung.com/Products/Semiconductor

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6 / 36 page

PRODUCT OVERVIEW

S3C7238/P7238/C7235/P7235

1-

6

Table 1-1. S3C7238/C7235 Pin Descriptions (Continued)

Pin Name

Type

Description

Number

Share

Reset

Value

Circuit

Type

LCDSY

I/O

LCD synchronization clock output for LCD

display expansion

33

P3.1

Input

D

TCL0

I/O

External clock input for timer/counter 0

27

P1.3

Input

A-1

TCLO0

I/O

Timer/counter 0 clock output

28

P2.0

Input

D

SI

I

Serial interface data input

23

P0.3

Input

A-1

SO

I/O

Serial interface data output

22

P0.2

Input

D *

SCK

I/O

Serial I/O interface clock signal

21

P0.1

Input

D *

INT0

INT1

I

External interrupts. The triggering edge for

INT0 and INT1 is selectable. Only INT0 is

synchronized with the system clock.

24

25

P1.0

P1.1

Input

A-1

INT2

I

Quasi-interrupt with detection of rising edge

signals.

26

P1.2

Input

A-1

INT4

I

External interrupt input with detection of rising

or falling edge

20

P0.0

Input

A-1

KS0–KS7

I/O

Quasi-interrupt inputs with falling edge

detection.

44–51

P6.0–P7.3

Input

D *

CLO

I/O

CPU clock output

30

P2.2

Input

D

BUZ

I/O

2, 4, 8 or 16 kHz frequency output for buzzer

sound with 4.19 MHz main system clock or

32.768 kHz subsystem clock.

31

P2.3

Input

D

XIN,

XOUT

–

Crystal, ceramic or RC oscillator pins for main

system clock. (For external clock input, use

X

IN and input XIN‘s reverse phase to XOUT)

15,14

–

XTIN,

XTOUT

–

Crystal oscillator pins for subsystem clock.

(For external clock input, use XT

IN and input

XT

IN's reverse phase to XTOUT)

17,18

–

VDD

–

Main power supply

12

–

VSS

–

Ground

13

–

RESET

–

Reset signal

19

–

Input

B

TEST

–

Test signal input (must be connected to VSS)

16

–

NOTES:

1.

Pull-up resistors for all I/O ports are automatically disabled if they are configured to output mode.

2.

D * Type has a schmitt trigger circuit at input.

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