CZ80CPU Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – 8-Bit Microprocessor Megafunction

CZ80CPU
8-bit Microprocessor Core
General Description
Implements a fast, fully-functional, single-chip, 8-
bit microprocessor with the same instruction set
as the Z80.
The core has a 16-bit address bus capable of
directly accessing 64kB of memory space. It has
252 root instructions with the reserved 4 bytes as
prefixes, and accesses an additional 308
instructions. The microcode-free design is strictly
synchronous, with no internal tri-states and a
synchronous reset.
Developed for easy reuse in Actel FPGA
applications, the CZ80CPU is available optimized
for several device families with competitive
utilization and performance characteristics.
Symbol
Features
Programming features contain 208 bits of
read/write memory that are accessible to the
programmer. The internal registers include an
accumulator and six 8-bit registers that can be
paired as three 16-bit registers. In addition to
general registers, a 16-bit stack-pointer, 16-bit
program-counter, and two 16-bit index registers
are provided.
• ^{Control Unit}
o 8-bit Instruction decoder
• ^{Arithmetic-Logic Unit}
o 8-bit arithmetic and logical operations
o 16-bit arithmetic operations
o Boolean manipulations
• ^{Register File Unit}
o Duplicate set of both general purpose and
flag registers
o Two 16-bit index registers
• ^{Interrupt Controller}
o Three modes of maskable interrupts
o Non maskable interrupt
• ^{External Memory interface}
o Can address up to 64 KB of program
memory
o Can address up to 64 KB of data memory
o Can address up to 64 KB of input/output
devices
• ^{On-core dynamic memory refresh counter}
Applications
Suitable for many embedded controller
applications, including industrial control systems,
point-of-sale terminals, and automotive controls.
CAST, Inc.
April 2003
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