MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 34

• Manufacturer Part Number: MC68EC000EI20
• Description: IC MPU 32BIT 20MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI20

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

MOTOROLA
Sign (s)
Biased Exponent (e)
Zero, Reserved (u)
Explicit Integer Bit (j)
Mantissa (f)
Total
Input
Output
Positive Mantissa
Negative Mantissa
Bias of Biased Exponent
Range of Biased Exponent
Explicit Integer Bit
Range of Mantissa
Mantissa (Explicit Integer Bit and Fraction )
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Bias of Biased Exponent
Explicit Integer Bit
Range of Mantissa
Mantissa (Explicit Integer Bit and Fraction )
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Mantissa (Explicit Integer Bit and Fraction )
Biased Exponent Format Maximum
Explicit Integer Bit
Mantissa (Explicit Integer Bit and Fraction )
Table 1-6. Extended-Precision Real Format Summary
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
95 94
s
Interpretation of Unused Bits
Denormalized Numbers
Interpretation of Sign
Normalized Numbers
Field Size (in Bits)
Signed Infinities
e
Signed Zeros
Data Format
80 79
z
64 63 62
i
0 < = e < 32767 ($7FFF)
f
(–1)
(–1)
+16383 ($3FFF)
Zero or Nonzero
+16383 ($3FFF)
32767 ($7FFF)
0
x.000…0000
s
s
Don’t Care
Don’t Care
0 ($0000)
0 ($0000)
All Zeros
Nonzero
2
s = 0
s = 1
2–
e–16383
0.0
15
16
63
96
1.f
0.f
1
1
1
0
16383
0.f
1.f
Introduction
1-23