MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 348

• 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: -

Floating Point Instructions
FGETEXP
Operation:
Assembler
Syntax:
Attributes:
Description: Converts the source operand to extended precision (if necessary) and
Operation Table:
Floating-Point Status Register:
5-46
extracts the binary exponent. Removes the exponent bias, converts the exponent to an
extended-precision floating- point number, and stores the result in the destination
floating- point data register.
Condition Codes:
Quotient Byte:
Exception Byte:
Accrued Exception Byte:
NOTES:
1. If the source operand is a NAN, refer to 1.6.5 Not-A-Numbers for more information.
2. Sets the OPERR bit in the floating-point status register exception byte.
DESTINATION
Result
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Exponent of Source
FGETEXP. < fmt > < ea > ,FPn
FGETEXP.X FPm,FPn
FGETEXP.X FPn
Format = (Byte, Word, Long, Single, Double, Extended, Packed)
+
Exponent
(MC6888X, M68040FPSP)
In Range
Affected as described in 3.6.2 Conditional Testing.
Not affected.
BSUN
SNAN
OPERR
OVFL
UNFL
DZ
INEX2
INEX1
Affected as described in IEEE exception and trap compati-
bility in the appropriate user’s manual.
Get Exponent
FPn
– +
+ 0.0
Cleared
Refer to 1.6.5 Not-A-Numbers.
Set if the source is
otherwise.
Cleared
Cleared
Cleared
Cleared
If < fmt > is packed, refer to inexact result on
decimal input in the appropriate user’s
manual; cleared otherwise.
SOURCE
Zero
1
– 0.0
– +
FGETEXP
Infinity
NAN
infinity; cleared
2
MOTOROLA
–