Intel MCS48 User Manual page 162

intJ
^
ID8048/8748/8035L
INDUSTRIAL
TEMPERATURE RANGE
SINGLE
COMPONENT
8-BIT
MICROCOMPUTER
•
8048
Mask
Programmable
ROM
•
8648 One-Time
Factory
Programmable
EPROM
•
8748 User Programmable/Erasable
EPROM
•
8035/8035L
External
ROM
or
EPROM
•
-40°C
to
+85°C
Operation
1Kx8 ROM/EPROM
64 x 8
RAM
27
I/O
LINES
Interval
Timer/Event Counter
8-Bit
CPU,
ROM, RAM,
I/O in
Single
Package
Interchangeable
ROM
and
EPROM
Versions
Single
5V
Supply
2.5 ptsec
and
5.0
^sec Cycle Versions:
All
instructions
1
or 2
Cycles
Over 90
Instructions:
70%
Single Byte
Easily
Expandable
Memory and
I/O
Compatible with 8080/8085 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's
N-channel
silicon
gate
MOS
process.
The 8048 contains a
1
K x
8
program memory,
a
64
x
8
RAM
data
memory,
27
I/O lines,
and an
8-bit
timer/counter
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™/MCS-85™
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-time
pro-
grammable
(at
the
factory)
8748 which can be ordered as the
first
25 pieces
of a
new
8048
ROM
order.
The
substitution
of 8648's for
8048's allows
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
TOC
XTAL id
2
XTAL
2[
3
RESETC
*
SSC
5
INtC 6
EAC
7
ROC
8
PSENC
9
wrC
io
aleC
n
DB
C
12
DB, C
13
DBjfJ 14
OB
3
C 15
DB
4
C
16
OB
5
C 17
DB
6
C
18
DB
7
C
19
v SsC
20
40
D v
cc
39 D
11
38
J?n
37
UP26
36
DP25
35 I]P24
34
|]P17
33
3P16
32
DP16
31
DP14
30
U P13
29
DP12
28
JP11
27 |]P10
26
DV
0D
25
UPROG
24 H
P23
23 D
p 22
22
3P21
21
D p 20
<0
Cv>
Pr
PROGRAM
-STORE
ENABLE
ADDRESS
-LATCH
ENABLE
PORT
-EXPANDER
STROBE
INTEL
CORPORATION ASSUMES NO
RESPONSIBILITY
FOR THE USE OF
ANY CIRCUITRY
OTHER THAN CIRCUITRY EMBODIED IN
AN
INTEL
PRODUCT. NO OTHER CIRCUIT PATENT LICENSES ARE
IMPLIED.
o
INTEL
CORPORATION. 1979
g.
1
q