Intel MCS48 User Manual page 188

intel
8022
SINGLE
COMPONENT
8-BIT
MICROCOMPUTER
WITH
ON-CHIP
A/D CONVERTER
8-Bit
CPU,
ROM, RAM,
I/O
in
Single 40-Pin
Package
On-Chip
8-Bit
A/D
Converter;
Two
Input
Channels
8 Comparator
Inputs (Port
0)
Zero-Cross Detection
Capability
Single
5V
Supply (4.5V
to
6.5V)
High Current
Drive Capability
—
2
Pins
Two
Interrupts
—
External
and Timer
2K
x
8
ROM, 64
x
8
RAM, 28
I/O Lines
8.38
jusec
Cycle;
All
Instructions
1
or
2
Cycles
Instructions
—
8048
Subset
Interval
Timer/ Event Counter
Clock Generated
with Single Inductor or
Crystal
Easily
Expanded
I/O
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/or
large
ROM
space.
The 8022 addresses these
applications by integrating
many new
functions on-
chip,
such as
A/D
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 I/O
lines,
an on-chip
A/D
converter with
two
input
channels, an
8-bit
port with comparator
inputs for interfacing to
low voltage
capacitive
touchpanels
or other
non-TTL interfaces, external
and
timer
interrupts,
and zero-cross detection
capabili-
ty. In
addition,
it
contains the
8-bit interval
timer/event
counter,
on-board
oscillator
and
clock
circuitry,
single
5V
power
supply requirement,
and
easily
expandable
I/O structure
common
to
all
members
of
the
MCS-48
family.
The 8022
is
designed
to
be an
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's hardware
implementation
of
the
A/D
converter which
simplifies interfacing to
analog signals.
PIN
CONFIGURATION LOGIC
SYMBOL
Vcc
v
ss
BLOCK DIAGRAM
P26
C
1
40
3
Vcc
P27
C
2 39
3
P25
AV
CC
C
3
38
3
P24
Varef
C
4
37
P
PROG
AN1 C
5
36 D
P23
ANO
C
6 35
H
P22
AVssC
7
34
3
P21
TOC
8
33
3 P20
VthC
9 32
3
P17
poo
C
10
8022
31
3
P16
poi C
11
30
3
P15
P02 C 12 29
3
P14
P03 C 13 28
3
P13
P04
C
14
27
3
P12
P05C
15
26
3 pn
P06
C 16 25
3 pio
P07
C
17
24
3 RESET
ALE C
18
23
3 XTAL2
TlC
19
22
3 XTAL
1
VssC
20 21
3
SUBST
INTEL
CORPORATION ASSUMES
NO
RESPONSIBILITY
FOR THE USE
OF ANY CIRCUITRY
OTHER THAN CRCUITRY
EMBOWED
IN
AN
INTEL
PRODUCT.
NO OTHER
CIRCUIT
PATENT LICENSES ARE IMPLIED.
©
INTEL
CORPORATION, 1979
6-36