MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 32
MC68EC000EI16
Manufacturer Part Number
MC68EC000EI16
Description
IC MPU 32BIT 16MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Specifications of MC68EC000EI16
Processor Type
M680x0 32-Bit
Speed
16MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
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MOTOROLA
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 1-4. Single-Precision Real Format Summary Data Format
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
31 30
s
Denormalized Numbers
Interpretation of Sign
Normalized Numbers
Approximate Ranges
Field Size In Bits
Signed Infinities
Signed Zeros
Data Format
e
NANs
23 22
f
0
(–1)
(–1)
0 < e < 255 ($FF)
Zero or Nonzero
0.1xxxx…xxxx
0.0xxxx…xxxx
11111…1111
xxxxx…xxxx
+126 ($7E)
1.2
1.4
+127 ($7F)
Don’t Care
s
3.4
s
255 ($FF)
255 ($FF)
Nonzero
Nonzero
0.f = 0.0
0.f = 0.0
0 ($00)
0 ($00)
s = 0
s = 1
2
2–
23
32
1.f
0.f
e–127
1
8
10–
10–
10
126
38
38
45
0.f
1.f
Introduction
1-21
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