nsc800 National Semiconductor Corporation, nsc800 Datasheet

nsc800

Manufacturer Part Number

nsc800

Description

Nsc800tm High-performance Low-power Cmos Microprocessor

Manufacturer

National Semiconductor Corporation

Datasheet

1.NSC800.pdf (76 pages)

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C 1995 National Semiconductor Corporation

NSC800

Low-Power CMOS Microprocessor

General Description

The NSC800 is an 8-bit CMOS microprocessor that func-

tions as the central processing unit (CPU) in National Semi-

conductor’s NSC800 microcomputer family

microCMOS technology used to fabricate this device pro-

vides system designers with performance equivalent to

comparable NMOS products but with the low power advan-

tage of CMOS Some of the many system functions incorpo-

rated on the device are vectored priority interrupts refresh

control power-save feature and interrupt acknowledge The

NSC800 is available in dual-in-line and surface mounted

chip carrier packages

The system designer can choose not only from the dedicat-

ed CMOS peripherals that allow direct interfacing to the

NSC800 but from the full line of National’s CMOS products

to allow a low-power system solution The dedicated periph-

erals include NSC810A RAM I O Timer NSC858 UART

and NSC831 I O

All devices are available in commercial industrial and mili-

tary temperature ranges along with two added reliability

flows The first is an extended burn in test and the second is

the military class C screening in accordance with Method

5004 of MIL-STD-883

Block Diagram

NSC800

TRI-STATE is a registered trademark of National Semiconductor Corp

Z80 is a registered trademark of Zilog Corp

is a trademark of National Semiconductor Corp

High-Performance

TL C 5171

National’s

Features

Fully compatible with Z80 instruction set

Powerful set of 158 instructions

10 addressing modes

22 internal registers

Low power 50 mW at 5V V

Unique power-save feature

Multiplexed bus structure

Schmitt trigger input on reset

On-chip bus controller and clock generator

Variable power supply 2 4V

On-chip 8-bit dynamic RAM refresh circuitry

Speed 1 0 s instruction cycle at 4 0 MHz

Capable of addressing 64k bytes of memory and 256

I O devices

Five interrupt request lines on-chip

NSC800-4

NSC800-35

NSC800-3

NSC800-1

4 0 MHz

3 5 MHz

2 5 MHz

1 0 MHz

6 0V

RRD-B30M105 Printed in U S A

TL C 5171– 73

June 1992

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