Intel mcs-48 manual Intel Corporation

108048/8748/8035 L INDUSTRIAL TEMPERATURE RANGE

SINGLE COMPONENT 8·BIT MICROCOMPUTER

•8048 Mask Programmable ROM

•8648 One·TimeFactory Programmable EPROM

•8748 User Programmable/Erasable EPROM

•8035/8035L External ROM or EPROM

•- 40°C to + 85°C Operation

•8·BitCPU, ROM, RAM, 1/0 in Single Package

•Interchangeable ROM and EPROM Versions

•Single 5V Supply

•2.5 fJsec and 5.0 fJsec Cycle Versions: All instructions 1 or 2 Cycles

•Over 90 Instructions: 70% Single Byte

•1K x 8 ROMIEPROM

64 x 8 RAM 271/0 LINES

•Interval TimerlEvent Counter

•Easily Expandable Memory and 1/0

•Compatible with 808018085 Series Peripherals

•Single Level Interrupt

The Intel® 8048/8648/8748/8035 is a totally self·sufficient 8·bit parallel computer fabricated on a single silicon chip using Intel'sN·channel silicon gate MOS process.

The 8048 contains a 1K x 8 program memory, a 64 x 8 RAM data memory, 271/0 lines, and an 8·bittimerlcounter in addi· tion to on·board oscillator and clock circuits. For systems that require extra capability, the 8048 can be expanded using standard memories and MCS·80™IMCS·85TM peripherals. The 8035 is the equivalent of an 8048 without program memory. The 8035L has the RAM power·down mode of the 8048 while the 8035 does not. The 8648 is a one·timepro· grammable (at the factory) 8748 which can be ordered as the first 25 pieces of a new 8048 ROM order. The substitution of 8648'sfor 8048'sallows for very fast turnaround for initial code verification and evaluation units.

To reduce development problems to a minimum and provide maximum flexibility, three interchangeable pin·compati· ble versions of this single component microcomputer exist: the 8748 with user·programmable and erasable EPROM program memory for prototype and preproduction systems, the 8048 with factory·programmed mask ROM program memory for low cost, high volume production, and the 8035 without program memory for use with external program memories.

This microprocessor is designed to be an efficient controller as well as an arithmetic processor. The 8048 has exten· sive bit handling capability as well as facilities for both binary and BCD arithmetic. Efficient use of program memory results from an instruction set consisting mostly of single byte instructions and no instructions over 2 bytes in length.

PIN CONFIGURATION LOGIC SYMBOL BLOCK DIAGRAM

8048

PlO

ADDRESS

LATCH

ENABLE

PORT

EXPANDER

STROBE

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