MC68EC000EI8 Freescale Semiconductor, MC68EC000EI8 Datasheet - Page 172

• Manufacturer Part Number: MC68EC000EI8
• Description: IC MPU 32BIT 85MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor
• Series: M68000r

Specifications of MC68EC000EI8

• Processor Type: M680x0 32-Bit
• Speed: 8MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Core Size: 32 Bit
• Cpu Speed: 8MHz
• 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: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

Integer Instructions
CAS
CAS2
Instruction Format:
Instruction Fields:
4-68
D/A1
D/A2
15
0
Size field—Specifies the size of the operation.
D/A1, D/A2 fields—Specify whether Rn1 and Rn2 reference data or address registers,
Rn1, Rn2 fields—Specify the numbers of the registers that contain the addresses of
Du1, Du2 fields—Specify the data registers that contain the update values to be written
Dc1, Dc2 fields—Specify the data registers that contain the test values to be compared
10 — Word operation
11 — Long operation
0 — The corresponding register is a data register.
1 — The corresponding register is an address register.
14
0
respectively.
the first and second memory operands, respectively. If the operands overlap in
memory, the results of any memory update are undefined.
to the first and second memory operand locations if the comparison is successful.
to the first and second memory operands, respectively. If Dc1 and Dc2 specify the
same data register and the comparison fails, memory operand 1 is stored in the
data register.
Rn1
Rn2
13
The CAS and CAS2 instructions can be used to perform secure
update operations on system control data structures in a
multiprocessing environment.
In the MC68040 if the operands are not equal, the destination or
destination 1 operand is written back to memory to complete the
locked access for CAS or CAS2, respectively.
0
12
0
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Compare and Swap with Operand
11
1
0
0
(MC68020, MC68030, MC68040)
10
0
0
SIZE
9
0
0
8
0
NOTE
CAS2
Du1
Du2
7
1
6
1
5
1
0
0
4
1
0
0
3
1
0
0
2
1
CAS2
MOTOROLA
Dc1
Dc2
CAS
1
0
0
0