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8080A Datasheet Preview

8080A Datasheet

8-BIT N-CHANNEL MICROPROCESSOR

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infel..
8080A/8080A-1/8080A-2
8-BIT N-CHANNEL MICROPROCESSOR
TTL Drive Capability
2,..,s (-1:1.3,..,s, -2:1.5 ,..,s) Instruction
Cycle
Powerful Problem Solving Instruction
Set
6 General Purpose Registers and an
Accumulator
16-Blt Program Counter for Directly
Addressing up to 64K Bytes of Memory
16-Blt Stack Pointer and Stack
Manipulation Instructions for Rapid
Switching of the Program Environment
Decimal, Binary, and Double Precision
Arithmetic
Ability to Provide Priority Vectored
Interrupts
512 Directly Addressed 110 Ports
Available In EXPRESS
- Standard Temperature Range
Available In 4Q-Lead Cerdlp and Plastic
Packages
(See Packaging Spec. Order #231369)
The Intel 8080A is a complete 8-bit parallel central processing unit (CPU). It is fabricated on a single LSI chip
using Intel's n-channel silicon gate MOS process. This offers the user a high performance solution to control
and processing applications.
The 8080A contains 6 8-bit general purpose working registers and an accumulator. The 6 general purpose
registers may be addressed individually or in pairs providing both single and double precision operators.
Arithmetic and logical instructions set or reset 4 testable flags. A fifth flag provides decimal arithmetic opera-
tion.
The 8080A has an external stack feature wherein any portion of memory may be used as a last in/first out
stack to store/retrieve the contents of the accumulator, flags, program counter, and all of the 6 general
purpose registers. The 16-bit stack pointer controls the addressing of this external stack. This stack gives the
8080A the ability to easily handle multiple level priority interrupts by rapidly storing and restoring processor
status. It also provides almost unlimited subroutine nesting.
This microprocessor has been designed to simplify systems design. Separate 16-lIne address and 8-line
bidirectional data busses are used to facilitate easy interface to memory and I/O. Signals to control the
interface to memory and I/O are provided directly by the 8080A. Ultimate control of the address and data
busses resides with the HOLD signal. It provides the ability to suspend processor operation and force the
address and data busses into a high impedance state. This permits OR-tying these busses with other control-
ling devices for (OMA) direct memory access or multi-processor operation.
NOTE:
The 8080A is functionally and electrically compatible with the Intel 8080.
November 1988
1-1 Order Number. 231453-001
This Material Copyrighted By Its Respective Manufacturer




Intel

8080A Datasheet Preview

8080A Datasheet

8-BIT N-CHANNEL MICROPROCESSOR

No Preview Available !

intel~
8080A/8080A-1/8080A-2
118'"
INTERNAL DATA BUS
t--""::'''--:::+--~''-'':'Il::4
..fGIIT."
..RUY
TIMING
....0
CONTROL
ACII
Figure 1. Block Diagram
AO"D'.-lO..'._""
A,.
GNO
O.
D.
O.
°7
0.
0,
0,0
D.
-SV
RESET
HOLO
'NT
"INTE 0
OBIN
WR
SYNC
+SV
A"
A,.
Au
Au
At.
"-
"-
At
"-
As
Ao
'"+IN
A,
A,
Ao
.,WAIT
RfADY
HLDA
Figure 2. Pin Configuration
231453-2
231453-1
1-2
This Material Copyrighted By Its Respective Manufacturer


Part Number 8080A
Description 8-BIT N-CHANNEL MICROPROCESSOR
Maker Intel
Total Page 10 Pages
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