M80C287 Datasheet, PDF (1/29 Pages) Intel Corporation – 80-BIT CHMOS III NUMERIC PROCESSOR EXTENSION

M80C287
80-BIT CHMOS III NUMERIC PROCESSOR EXTENSION
Military
Y High Performance 80-Bit Internal
Architecture
Y Implements ANSI IEEE Standard 754-
1985 for Binary Floating-Point
Arithmetic
Y Implements Extended M387 Numerics
Coprocessor Instruction Set
Y Two to Three Times M8087 M80287
Performance at Equivalent Clock Speed
Y Low Power Consumption
Y Upward Object-Code Compatible from
M8087 and M80287
Y Interfaces with M80286 and M80C286
CPUs
Y Expands CPU’s Data Types to Include
32- 64- 80-Bit Floating Point 32- 64-
Bit Integers and 18-Digit BCD Operands
Y Directly Extends CPU’s Instruction Set
to Trigonometric Logarithmic
Exponential and Arithmetic
Instructions for All Data Types
Y Full-Range Transcendental Operations
for SINE COSINE TANGENT
ARCTANGENT and LOGARITHM
Y Built-In Exception Handling
Y Operates in Both Real and Protected
Mode Systems
Y Eight 80-Bit Numeric Registers Usable
as Individually Addressable General
Registers or as a Register Stack
Y Available in 40-pin CERDIP
(See Packaging Outlines and Dimensions order 231369)
Y Military Temperature Range
b_{55 C to} a_{125 C (TC)}
The Intel M80C287 is a high-performance numerics processor extension that extends the architecture of the
M80C286 CPU with floating point extended integer and BCD data types A computing system that includes
the M80C287 fully conforms to the IEEE Floating Point Standard Using a numerics oriented architecture the
M80C287 adds over seventy mnemonics to the instruction set of the M80C286 CPU making a complete
solution for high-performance numerics processing The M80C287 is implemented with 1 5 micron high-speed
CHMOS III technology and packaged in a 40-pin CERDIP The M80C287 is upward object-code compatible
from the M80287 and M8087 numerics coprocessors With proper socket design either an M80287 or an
M80C287 can use the same socket
November 1991
Figure 1 M80C287 Block Diagram
271092 – 1
Order Number 271092-005