8-BIT N-CHANNEL MICROPROCESSOR
• TTL Drive Capability
• 2,..,s (-1:1.3,..,s, -2:1.5 ,..,s) Instruction
• Powerful Problem Solving Instruction
• 6 General Purpose Registers and an
• 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
• Ability to Provide Priority Vectored
512 Directly Addressed 110 Ports
• Available In EXPRESS
• - Standard Temperature Range
• Available In 4Q-Lead Cerdlp and Plastic
(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-
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.
The 8080A is functionally and electrically compatible with the Intel 8080.
1-1 Order Number. 231453-001
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