S3C821 datasheet(8/33 Pages) SAMSUNG

Part #	S3C821

Description	S3C8-SERIES MICROCONTROLLES

Download	33 Pages

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Manufacturer	SAMSUNG [Samsung semiconductor]

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

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8 / 33 page

PRODUCT OVERVIEW

S3C821A/P821A

1-8

Table 1-1. S3C821A Pin Descriptions (Continued)

Names

Type

Description

Circuit

Type

Numbers

Share

Pins

SEG16–

SEG23

I/O

LCD segment signal output

H-32

72–79 (74–80, 1)

P0.0–P0.7

SEG24–

SEG31

I/O

LCD segment signal output

H-32

80, 1–7 (2–9)

P1.0–P1.7

A8–A15

I/O

External interface address lines

H-32

72–79 (74–80, 1)

P0.0–P0.7

AD0–AD7

I/O

External interface address/data lines

H-32

80, 1–7 (2–9)

P1.0–P1.7

AS

I/O

Address strobe

D-4

8 (10)

P2.0

DR

I/O

Data read

D-4

9 (11)

P2.1

DW

I/O

Data write

D-4

18 (20)

P2.2

DM

I/O

Data memory select

D-4

19 (21)

P2.3

NOTE: Parentheses indicate pin number for 80-QFP package.

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