DS87C520WCL Dallas Semiconductor, DS87C520WCL Datasheet

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DS87C520WCL

Manufacturer Part Number

DS87C520WCL

Description

CDIP-24

Manufacturer

Dallas Semiconductor

Datasheet

1.DS87C520WCL.pdf (37 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Bonase Electronics (HK) Co., Limited

Part Number:

DS87C520WCL

Manufacturer:

TYCO

Quantity:

13 066

Current page: 1 of 37
Download datasheet (472Kb)

FEATURES

All Rights Reserved. For important information regarding

patents and other intellectual property rights, please refer to

Dallas Semiconductor data books.

80C52 compatible

Large On–chip Memory

ROMSIZE Feature

High–Speed Architecture

Power Management Mode

EMI Reduction Mode disables ALE

Two full–duplex hardware serial ports

High integration controller includes:

13 total interrupt sources with 6 external

Available in 40–pin PDIP, 44–pin PLCC, 44–pin

TQFP, and 40–pin windowed CERDIP

Factory Mask DS83C520 or EPROM (OTP)

DS87C520

Copyright 1995 by Dallas Semiconductor Corporation.

– 8051 pin and instruction set compatible

– Four 8–bit I/O ports

– Three 16–bit timer/counters

– 256 bytes scratchpad RAM

– 16KB Program Memory

– 1KB extra on–chip SRAM for MOVX

– Selects internal ROM size from 0 to

– Allows access to entire external memory map

– Dynamically adjustable by software

– Useful as boot block for external FLASH

– 4 clocks/machine cycle (8051 = 12)

– Runs DC to 33 MHz clock rates

– Single–cycle instruction in 121 ns

– Dual data pointer

– Optional variable length MOVX to access fast/

– Programmable clock source to save power

– CPU runs from (crystal/64) or (crystal/1024)

– Provides automatic hardware and software exit

– Power–fail reset

– Early–warning power–fail interrupt

– Programmable Watchdog timer

16KB

slow RAM/peripherals

EPROM/ROM High–Speed Micro

PACKAGE OUTLINE

P1.2/RXD1

P3.0/RXD0

P1.1/T2EX

P1.3/TXD1

P3.1/TXD0

P1.4/INT2

P1.5/INT3

P1.6/INT4

P1.7/INT5

P3.2/INT0

P3.3/INT1

P3.6/WR

P3.7/RD

P1.0/T2

P3.4/T0

P3.5/T1

XTAL2

XTAL1

17

34

44

7

RST

V

SS

DS87C520/DS83C520

18

6

33

1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

40–PIN CER DIP

/DS83C520

DS87C520

/DS83C520

40–PIN PDIP

44–PIN PLCC

DS87C520

44–PIN TQFP

DALLAS

DS87C520

DS83C520

DALLAS

DALLAS

1

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

40

28

23

11

PRELIMINARY

DS87C520/DS83C520

39

29

EA/V

PSEN

VCC

P0.0

P0.1

P0.2

P0.3

P0.4

P0.5

P0.6

P0.7

ALE/PROG

P2.7

P2.6

P2.5

P2.4

P2.3

P2.2

P2.1

P2.0

22

12

110195 1/37

PP

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