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SOSSAH/SOSSAH-21S0SSAH-1
S-BIT
HMOS MICROPROCESSORS
• Single +SV Power
Supply
with
10%
Voltage
Margins
• 3 MHz, S MHz and 6 MHz
Selections
Available
•
20%
Lower
Power Consumption than
SOSSA
for
3 MHz and S MHz
• 1.3
J-ts
Instruction
Cycle
(SOSSAH);
O.S
J-ts
(SOSSAH-2);
0.67
J-ts
(SOSSAH-1)
• 100% Compatible with
SOSSA
• 100
%
Software Compatible with 80S0A
•
On-Chip Clock
Generator
(with
External Crystal, LC
or
RC
Network)
• On-Chip System
Controller;
Advanced
Cycle Status
Information
Available
for
Large System Control
•
Four Vectored
Interrupt
Inputs
(One
is
Non-Maskable) Plus an
SOSOA-Compatible
Interrupt
• Serial In/Serial Out Port
• Decimal,
Binary
and Double Precision
Arithmetic
• Direct
Addressing
Capability
to
64K
Bytes
of
Memory
• Available in EXPRESS
- Standard Temperature Range
- Extended Temperature Range
The Intel® 8085AH is a complete 8 bit parallel Central Processing Unit (CPU) implemented in N-channel,
depletion load, silicon
gate
technology
(HMOS). Its
instruction
set is 1 00% software
compatible
with the8080A
microprocessor, and
it
is designed
to
improve the present 8080A's performance by
higher
system speed. Its
high
level
of
system integration allows a
minimum
system
of
three IC's [8085AH (CPU), 8156H (RAM/I
0)
and
8355/8755A (ROM/PROM/IO)] while maintaining total system expandability. The 8085AH-2 and 8085AH-1 are
faster versions
of
the 8085AH.
The 8085AH incorporates
all
of
the features that the 8224 (clock generator) and 8228 (system controller)
provided
for
the 8080A, thereby offering a high level
of
system integration.
The 8085AH uses a
multiplexed data bus. The address is split
betw~en
the 8 bit address bus and the 8 bit data
bus. The
oli-chip
address latches
of
8155H/8156H/8355/8755A memory
products
allow
a
direct
interface with
the 8085AH.
POWER
{_"'v
SUPPLY
-GND
X,
x,
tNi"
Als-Aa
ADDRESS BUS
Figure 1. 8085AH
CPU
Functional
Block
Diagram
AD7-ADO
ADDR
ESS/OAT
A
BUS
Xl
X2
RESET
OUT
SOD
Vee
HOLD
HlDA
elK
lOUT)
RESET
IN
READY
101M
51
RST
55
AD
INTR
WR
INTA
ALE
ADO
So
ADl
A15
AD2
A14
AD3
A13
AD4
A12
AD5
All
AD6
Al0
AD7
Ag
....
__
,.,J"""A8
Figure
2.
8085AH Pin
Configuration
Intel Corporation Assumes No Responsibilty for the
Use
of
Any Circuitry Other Than Circuitry Embodied
in
an
Intel Product. No
Other
Circuit Patent
Licenses
ale
Implied.
'"INTEL
CORPORATION,
1981.
6-10