MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 252

• Manufacturer Part Number: MC68EC040RC25
• Manufacturer: Freescale Semiconductor

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

9-8
Sign (s)
Biased Exponent (e)
Fraction (f)
Total
Positive Fraction
Negative Fraction
Bias of Biased Exponent
Range of Biased Exponent
Range of Fraction
Fraction
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Bias of Biased Exponent
Range of Fraction
Fraction
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Fraction
Biased Exponent Format Maximum
Fraction
Sign
Biased Exponent Format Maximum
Fraction
Representation of Fraction
Maximum Positive Normalized
Minimum Positive Normalized
Minimum Positive Denormalized
Nonsignaling
Signaling
Nonzero Bit Pattern Created by User
Fraction When Created by FPCP
Table 9-3. Single-Precision Real Format Summary
Freescale Semiconductor, Inc.
For More Information On This Product,
31 30
s
M68040 USER’S MANUAL
Go to: www.freescale.com
Denormalized Numbers
e
Interpretation of Sign
Normalized Numbers
Approximate Ranges
23 22
Field Size In Bits
Signed Infinities
Signed Zeros
Data Format
NANs
f
(–1) s
(–1) s
0 < e < 255 ($FF)
Zero or Nonzero
11111…1111
1xxxx…xxxx
0xxxx…xxxx
xxxxx…xxxx
0
1.2 10 –38
1.4
+126 ($7E)
+127 ($7F)
Don’t Care
3.4 10 38
255 ($FF)
255 ($FF)
0.f = 0.0
0.f = 0.0
Nonzero
Nonzero
0 ($00)
0 ($00)
2 e–127
s = 0
s = 1
2 –126
32
23
1.f
0.f
1
8
10 –45
0.f
1.f
MOTOROLA