Intel mcs-48 manual 8022

8022

SINGLE COMPONENT a-BIT MICROCOMPUTER

WITH ON-CHIP AID CONVERTER

•8-Bit CPU, ROM, RAM, 1/0 in Single 40-Pin

Package

•On-Chip 8-Bit AID Converter; Two Input

Channels

•8 Comparator Inputs (Port 0)

•Zero-Cross Detection Capability

•Single SV Supply (4.SV to 6.SV)

•High Current Drive Capability-2 Pins

•Two Interrupts-External and Timer

•2K x 8 ROM, 64 x 8 RAM, 28 1/0 Lines

•8.38 ,usec Cycle; All Instructions 1 or 2

Cycles

•Instructions-8048 Subset

•Interval Timer IEvent Counter

•Clock Generated with Single Inductor or Crystal

•Easily Expanded 1/0

The Intel@) 8022 is the newest member of the MCS-48™ family of single chip 8-bit microcomputers_ It is designed to satisfy the requirements of low cost, high volume applications which involve analog signals, capacitive touchpanel keyboards, and I or large ROM space. The 8022 addresses these applications by integrating many new functions on- chip, such as AID conversion, comparator inputs and zero-cross detection.

The features of the 8022 include 2K bytes of program memory (ROM), 64 bytes of data memory (RAM), 28 110 lines, an on-chip AID converter with two input channels, an 8-bit port with comparator inputs for interfacing to low voltage capacitive touchpanels or other non-TIL interfaces, external and timer interrupts, and zero-cross detection capabili- ty. In addition, it contains the 8-bit interval timer I event counter, on-board oscillator and clock circuitry, single 5V power supply requirement, and easily expandable 1/0 structure common to all members of the MCS.-48 family.

The 8022 is designed to bean efficient controller as well as an arithmetic processor. It has bit handling capability plus facilities for both binary and BCD arithmetic. Efficient use of program memory results from using the MCS-48 instruction set which consists mostly of single byte instructions and has extensive conditional jump and direct table lookup capability. Program memory usage is further reduced via the 8022'shardware implementation of the AID converter which simplifies interfacing to analog signals.

PIN CONFIGURATION			LOGIC SYMBOL	BLOCK DIAGRAM
		Vee	Vss
		XTAL r	PORTO
			THRESHOLD
P26	Vee		REFERENCE , -___----,
P21	P2S
AVec	P2'
VAREF	PROG	REseT ....
ANl	P23
	P22
AVSS	P21	TEST 0..
TO	P20		8022
	P11
		TEST 1
	Pl.
	P1S
P02	Pl'
P03	P13	AlD
		REFERENCE
	P12
P04
POS	P11
PO.	Pl.	AND ...	ADDRESS
P01	RESET		LATCH
			ENABLE
ALE	XTAL 2
T1	XTAL 1
Vss	SUBST	ANl	PORT
			--EXPANDER
			STROBE
			I
		AID	AID SUBSTRATE
		Vee	Vas
			6-51	AFN-00187A-o1