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TS8882VF20 Datasheet

  • TS8882VF20

  • 42頁(yè)

  • ETC

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Features
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Eight General Purpose Floating-point Data Registers, Each Supporting a Full 80-bit
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Extended Precision Real Data Format (a 64-bit Mantissa Plus a Sign Bit, and a 15-bit
Signed Exponent)
A 67-bit Arithmetic Unit to Allow Very Fast Calculations With Intermediate Are
Precision Greater Than the Extended Precision Format
A 67-bit Barrel Shifter for High-speed Shifting Operations (for Normalizing etc.)
Special Purpose Hardware for High-speed Conversion Between Single, Double, and
Extended Formats and the Internal Extended Format
An Independent State Machine to Control Main Processor Communication for
Pipelined Instruction Processing
Forty-six Instructions, Including 35 Arithmetic Operations
Full Conformation to the IEEE 754 Standard, Including All Requirements and
Suggestions
Support of Functions Not Defined by the IEEE Standard, Including a Full Set of
Trigonometric and Transcendental Functions
Seven Data Type Types: Byte, Word and Long Integers; Single, Double, and Extended
Precision Real Numbers; and Packed Binary Coded Decimal String Real Numbers
Twenty-two Constants Available In The On-chip ROM, Including
蟺,
e, and Powers of 10
Virtual Memory / Machine Operations
Efficient Mechanisms for Procedure Calls, Context Switches, and Interrupt Handling
Fully Concurrent Instruction Execution with the Main Processor
Fully Concurrent Instruction Execution of Multiple Floating-point Instructions
Use with any host processor, on an 8-, 16- or 32-bit Data Bus
Available in 16.67, 20, 25 and 33 MHz for T
c
from -55擄C to +125擄C
V
CC
= 5V 鹵 10%
CMOS
Enhanced
Floating-point
Coprocessor
TS68882
Description
The TS 68882 enhanced floating-point coprocessor is a full implementation of the
IEEE Standard for Binary Floating-Point Arithmetic (754) for use with the THOMSON
TS 68000 Family of microprocessors. It is a pin and software compatible upgrade of
the TS 68881 with optimized MPU interface that provides over 1.5 times the perfor-
mance of the TS 68881. It is implemented using VLSI technology to give systems
designers the highest possible functionality in a physically small device.
Intended primarily for use as a coprocessor to the TS 68020/68030 32-bit micropro-
cessor units (MPUs), the TS 68882 provides a logical extension to the main MPU
integer data processing capabilities. It does this by providing a very high performance
floating-point arithmetic unit and a set of floating-point data registers that are utilized
in a manner that is analogous to the use of the integer data registers. The TS 68882
instruction set is a natural extension of all earlier members of the TS 68000 Family,
and supports all of the addressing modes of the host MPU. Due to the flexible bus
interface of the TS 68000 Family, the TS 68882 can be used with any of the MPU
devices of the TS 68000 Family, and it may also be used as a peripheral to non-TS
68000 processors.
Screening/Quality
This product could be manufactured
in full compliance with either:
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MIL-STD-883 Class B
DESC 5962-89436
or According to ATMEL-
Grenoble Standards
Rev. 2119A鈥?2/01
R suffix
PGA 68
Ceramic Pin Grid Array
F suffix
CQFP 68
Ceramic Quad Flat Pack
1

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