MC68EC000EI12 Freescale Semiconductor, MC68EC000EI12 Datasheet - Page 33

• Manufacturer Part Number: MC68EC000EI12
• Description: IC MPU 32BIT 12MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: 68K - M680X0r

Specifications of MC68EC000EI12

• Processor Type: M680x0 32-Bit
• Speed: 12MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Core Size: 32 Bit
• Cpu Speed: 12MHz
• Digital Ic Case Style: PLCC
• No. Of Pins: 68
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°C To +70°C
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Clock Frequency: 12MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Introduction
1-22
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 (Mantissa/Significand)
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 1-5. Double-Precision Real Format Summary
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
63 62
s
Denormalized Numbers
Interpretation of Sign
Normalized Numbers
Approximate Ranges
Field Size (in Bits)
Signed Infinities
Signed Zeros
Data Format
e
NANs
52 51
f
0 < e < 2047 ($7FF)
(–1)
(–1)
0
Zero or Nonzero
+1022 ($3FE)
+1023 ($3FF)
11111…1111
2047 ($7FF)
1xxxx…xxxx
0xxxx…xxxx
xxxxx…xxxx
2.2 x 10–
4.9 x 10–
s
255 ($7FF)
s
18 x 10
Nonzero
Nonzero
0 ($000)
0.f = 0.0
0.f = 0.0
0 ($00)
0 or 1
s = 0
s = 1
2
2–
e–1023
11
52
64
1.f
0.f
1
1022
308
308
324
0.f
1.f
MOTOROLA