MC68EC060RC66 Freescale Semiconductor, MC68EC060RC66 Datasheet - Page 132

• Manufacturer Part Number: MC68EC060RC66
• Description: IC MPU 32BIT 66MHZ 206-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC060RC66

• Processor Type: M680x0 32-Bit
• Speed: 66MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 206-PGA
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Operating Supply Voltage (min): 3.135V
• Operating Temp Range: 0C to 110C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 206
• Package Type: PGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

Floating-Point Unit
handled in this manner. If the destination data format is extended and there is a difference
between the infinitely precise intermediate result and the round-to-nearest result, the rela-
tive difference is 2
significant bit’s value and is the worst case error that can be introduced when using the RN
6-14
Rounded-to-Nearest
RN
Intermediate
ROUND AND STICKY = 0
Result
ROUND OR STICKY = 1
GUARD AND LSB = 1,
ADD 1 TO
GUARD = 1
–64
LSB
OR
(the value of the guard bit). This error is equal to one-half of the least
Figure 6-9. Rounding Algorithm Flowchart
ADD 1 TO EXPONENT
SHIFT MANTISSA
RIGHT 1 BIT,
Integer
POS
INTERMEDIATE
x
x
RM
RESULT
M68060 USER’S MANUAL
NEG POS
ADD 1 TO
OVERFLOW = 1
LSB
INTERMEDIATE
63-Bit Fraction
SELECT ROUNDING MODE
RP
RESULT
xxx…x00
xxx…x00
INEX2 1
ROUND 0
GUARD 0
STICKY 0
NEG
ENTRY
EXIT
AND STICKY ARE
GUARD, ROUND,
AND STICKY BITS = 0
CHOPPED
RZ
GUARD, ROUND,
Guard
1
0
Round
EXACT RESULT
0
0
EXIT
Sticky
MOTOROLA
0
0