CZ80CPU Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – 8-Bit Microprocessor Megafunction

CZ80CPU
8-Bit Microprocessor
Megafunction
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 was developed for
reuse in ASIC and FPGA implementations. It is
strictly synchronous, with no internal tri-states
and a synchronous reset.
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}
CAST, Inc.
April 2004
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