Intel mcs-48 manual Introduction to MCS-48

INTRODUCTION

1.0 Introduction to MCS-48™

Recent advances in NMOS technology have allowed Intel for the first time to place enough .capability on a single silicon die to create a true single-chip microcomputer containing all the functions required in a digital processing system. A set of such microcomputers on single chips, their variations, and optional peripherals are collectively called the MCS-48 micro- computer family. These products are fully described in this manual.

The head of the family is the 8048 microcomputer which contains the following functions in a single 40 pin package:

8-Bit CPU

1K x 8 ROM Program Memory

64 x 8 RAM Data Memory

27 I/O Lines

8-Bit Timer/Event Counter

A 2.5 or 5.0 microsecond cycle time and a repertoire of over 90 instructions, each consisting of either one or two cycles, makes the single chip 8048 the equal in performance of most presently available multi-chip NMOS microprocessors. The 8048 is, however, a true "low-cost"

microcomputer. A single 5V supply re- quirement for all MCS-48 components assures that "low cost" also applies to the power supply in your system.

New Family Members

The MCS-48 family of microcomputers which began with the 8048 and 8748 has now been expanded with new members which provide either more capability or lower cost than the original family mem- bers. While broadening the applications possible with a single chip microcomputer, these new microcomputers share both the instruction set and development support of the 8048.

The 8049 is a single-chip microcomputer which is completely interchangeable with the 8048, but contains twice the program memory and twice the data memory of the 8048.

The 8022 is an 8021-based microcomputer with additional memory, 1/0, and an AID converter.

The 8021 is a new very low cost MCS-48 family member which contains a subset of

8049	8048	8021	8022	FEATURES
~	~	~	~	8·BITCPU
2Kx8	1Kx8	1Kx 8	2Kx8	PROGRAM MEMORY
128x 8	64x8	64x8	64x 8	DATA RAM
27	27	21	28	1/0 LINES
~	~	~	~	TIMER COUNTER
~	~	~	~	OSCILLATOR AND CLOCK
~	~	~	~	RESET CIRCUIT
~	~		~	INTERRUPT

ON CHIP FEATURES

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