MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 325
MC68EC000EI20
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
-
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FBcc
Operation:
Assembler:
Syntax:
Attributes:
Description: If the specified floating-point condition is met, program execution continues at
Floating-Point Status Register:
MOTOROLA
the location (PC) + displacement. The displacement is a twos-complement integer that
counts the relative distance in bytes. The value of the program counter used to
calculate the destination address is the address of the branch instruction plus two. If
the displacement size is word, then a 16- bit displacement is stored in the word
immediately following the instruction operation word. If the displacement size is long
word, then a 32-bit displacement is stored in the two words immediately following the
instruction operation word. The conditional specifier cc selects any one of the 32
floating- point conditional tests as described in 3.6.2 Conditional Testing.
Condition Codes:
Quotient Byte:
Exception Byte:
Accrued Exception Byte:
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
If Condition True
FBcc. < size > , < label >
Size = (Word, Long)
Floating-Point Branch Conditionally
Then PC + d
Not affected.
Not affected.
BSUN
SNAN
OPERR
OVF
UNFL
DZ
INEX2
INEX1
The IOP bit is set if the BSUN bit is set in the exception
byte. No other bit is affected.
(MC6888X, MC68040)
n
PC
Set if the NAN condition code is set and the
condition selected is an IEEE nonaware test.
Not Affected.
Not Affected.
Not Affected.
Not Affected.
Not Affected.
Not Affected.
Not Affected.
Floating Point Instructions
FBcc
5-23
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