MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 251
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MC68EC040RC25
Manufacturer Part Number
MC68EC040RC25
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC040RC25.pdf
(442 pages)
Specifications of MC68EC040RC25
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
25MHz
Instruction Set Architecture
RISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
179
Package Type
PGA
Lead Free Status / Rohs Status
Supplier Unconfirmed
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they can be used to read the FPIAR in an exception handler without changing the
previous value. A reset or a restore operation of the null state clears the FPIAR.
9.3 FLOATING-POINT DATA FORMATS AND DATA TYPES
The M68000 floating-point model (MC68881, MC68882, MC68040) supports the following
data formats: single precision, double precision, extended precision, and packed decimal.
The M68000 floating-point model supports the following data types: normalized, zeros,
infinities, denormalized numbers, and NANs. The MC68040 supports part of the M68000
floating-point model in hardware. Table 9-2 lists the data formats and data types
supported by the MC68040. Tables 9-3 through 9-6 summarize the floating-point data
formats and data types details. For further information on the data formats and data types,
refer to the M68000UM/AD, M68000 Family Programmer’s Reference Manual .
MOTOROLA
*Data Format/Type Supported by On-Chip MC68040 FPU Hardware
†Data Format/Type Supported by Software (MC68040FPSP)
Normalized
Zero
Infinity
NAN
Denormalized
Unnormalized
Number
Types
Table 9-2. MC68040 FPU Data Formats and Data Types
Precision
Single-
Real
*
*
*
*
†
Freescale Semiconductor, Inc.
For More Information On This Product,
Precision
Double-
Real
*
*
*
*
†
Go to: www.freescale.com
M68040 USER’S MANUAL
Extended-
Precision
Real
*
*
*
*
†
†
Data Formats
Packed-
Decimal
Real
†
†
†
†
†
†
Integer
Byte
*
*
Integer
Word
*
*
Integer
Long -
Word
*
*
9- 7
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