MC68020CRC16E Freescale Semiconductor, MC68020CRC16E Datasheet - Page 163

no-image

MC68020CRC16E

Manufacturer Part Number
MC68020CRC16E
Description
IC MICROPROCESSOR 32BIT 114-PGA
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68020CRC16E

Processor Type
M680x0 32-Bit
Speed
166MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
114-PGA
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
16.67MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
5V
Operating Supply Voltage (max)
5.25V
Operating Supply Voltage (min)
4.75V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
114
Package Type
PGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68020CRC16E
Manufacturer:
MOT
Quantity:
10
7.2.2 Coprocessor Conditional Instructions
The conditional instruction category provides program control based on the operations of
the coprocessor. The coprocessor evaluates a condition and returns a true/false indicator
to the main processor. The main processor completes the execution of the instruction
based on this true/false condition indicator.
The implementation of instructions in the conditional category promotes efficient use of
both the main processor and the coprocessor hardware. The condition specified for the
instruction is related to the coprocessor operation and is therefore evaluated by the
coprocessor. However, the instruction completion following the condition evaluation is
directly related to the operation of the main processor. The main processor performs the
change of flow, the setting of a byte, or the TRAP operation, since its architecture explicitly
implements these operations for its instruction set.
Figure 7-8 shows the protocol for a conditional category coprocessor instruction. The main
processor initiates execution of an instruction in this category by writing a condition
selector to the condition CIR. The coprocessor decodes the condition selector to
determine the condition to evaluate. The coprocessor can use response primitives to
request that the main processor provide services required for the condition evaluation.
7-10
M1
OPERATION WORD
M2
COMMAND CIR
M3
FROM RESPONSE CIR
1) PERFORM SERVICE REQUESTED BY RESPONSE
PRIMITIVE
2) IF (COPROCESSOR RESPONSE PRIMITIVE
INDICATES "COME AGAIN") GO TO M3
(SEE NOTE 1)
M4
(SEE NOTE 2)
NOTES: 1. "Come Again" indicates that further service of the main processor is being requested by the coprocessor.
RECOGNIZE COPROCESSOR INSTRUCTION F-LINE
READ COPROCESSOR RESPONSE PRIMITIVE CODE
PROCEED WITH EXECUTION OF NEXT INSTRUCTION
WRITE COPROCESSOR COMMAND WORD TO
2. The next instruction should be the operation word pointed to by the ScanPC at this point. The operation of
the MC68020/EC020 ScanPC is discussed in
MAIN PROCESSOR
Figure 7-7. Coprocessor Interface Protocol
Freescale Semiconductor, Inc.
For More Information On This Product,
for General Category Instructions
M68020 USER’S MANUAL
Go to: www.freescale.com
7.4.1 ScanPC.
C1
COMMAND EXECUTION
C2
DO STEPS 1) AND 2) BELOW
1) REQUEST SERVICE BY PLACING APPROPRIATE
2) RECEIVE SERVICE FROM MAIN PROCESSOR
C3
C4
C5
RESPONSE CIR
DECODE COMMAND WORD AND INITIATE
WHILE (MAIN PROCESSOR SERVICE IS REQUIRED)
REFLECT "NO COME AGAIN" IN RESPONSE CIR
COMPLETE COMMAND EXECUTION
REFLECT "PROCESSING FINISHED" STATUS IN
RESPONSE PRIMITIVE CODE IN RESPONSE CIR
COPROCESSOR
MOTOROLA

Related parts for MC68020CRC16E