MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 170
MC68EC000EI16
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
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Integer Instructions
CAS
CAS2
Operation:
Assembler
Syntax:
Attributes:
Description: CAS compares the effective address operand to the compare operand (Dc).
Condition Codes:
4-66
*.
CAS2 cannot use byte operands.
If the operands are equal, the instruction writes the update operand (Du) to the effective
address operand; otherwise, the instruction writes the effective address operand to the
compare operand (Dc).
CAS2 compares memory operand 1 (Rn1) to compare operand 1 (Dc1). If the oper-
ands are equal, the instruction compares memory operand 2 (Rn2) to compare oper-
and 2 (Dc2). If these operands are also equal, the instruction writes the update
operands (Du1 and Du2) to the memory operands (Rn1 and Rn2). If either comparison
fails, the instruction writes the memory operands (Rn1 and Rn2) to the compare oper-
ands (Dc1 and Dc2).
Both operations access memory using locked or read-modify-write transfer sequences,
providing a means of synchronizing several processors.
X — Not affected.
N — Set if the result is negative; cleared otherwise.
Z — Set if the result is zero; cleared otherwise.
V — Set if an overflow is generated; cleared otherwise.
C — Set if a borrow is generated; cleared otherwise.
—
X
N
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
CAS Destination – Compare Operand
CAS2 Destination 1 – Compare 1
CAS Dc,Du, < ea >
CAS2 Dc1:Dc2,Du1:Du2,(Rn1):(Rn2)
Size = (Byte
Z
Compare and Swap with Operand
If Z, Update Operand
Else Destination
If Z, Destination 2 – Compare 2
If Z, Update 1
Else Destination 1
V
(MC68020, MC68030, MC68040)
C
*
, Word, Long)
Destination 1; Update 2
Compare Operand
Compare 1; Destination 2
Destination
cc;
cc
cc;
Destination 2
Compare 2
CAS2
MOTOROLA
CAS
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