MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 71
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MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
Manufacturer
Freescale
Datasheet
1.MCF5272VF66.pdf
(544 pages)
Specifications of MCF5272VF66
Family Name
MCF5xxx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
3.3V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
196
Package Type
MA-BGA
Lead Free Status / RoHS Status
Not Compliant
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For register-to-memory operations, the stage functions (DS/OC, AG/EX) are effectively performed
simultaneously allowing single-cycle execution. For read-modify-write instructions, the pipeline
effectively combines a memory-to-register operation with a store operation.
2.1.1.2.1
On Version 2 ColdFire implementations, only some illegal opcodes (0x0000 and 0x4AFC) are decoded
and generate an illegal instruction exception. Additionally, attempting to execute an illegal line A or line F
opcode generates unique exception types. If any other unsupported opcode is executed, the resulting
operation is undefined.
2.1.1.2.2
The MAC is an optional unit in Version 2 that provides hardware support for a limited set of digital signal
processing (DSP) operations used in embedded code, while supporting the integer multiply instructions in
the ColdFire microprocessor family. The MAC features a three-stage execution pipeline, optimized for 16
x 16 multiplies. It is tightly coupled to the OEP, which can issue a 16 x 16 multiply with a 32-bit
accumulation plus fetch a 32-bit operand in a single cycle. A 32 x 32 multiply with a 32-bit accumulation
requires three cycles before the next instruction can be issued.
Figure 2-2
unsigned integers plus signed, fixed-point fractional input operands.
The MAC provides functionality in the following three related areas, which are described in detail in
Chapter 3, “Hardware Multiply/Accumulate (MAC)
Freescale Semiconductor
•
•
•
Signed and unsigned integer multiplies
Multiply-accumulate operations with signed and unsigned fractional operands
Miscellaneous register operations
shows basic functionality of the MAC. A full set of instructions are provided for signed and
Illegal Opcode Handling
Hardware Multiply/Accumulate (MAC) Unit
Figure 2-2. ColdFire Multiply-Accumulate Functionality Diagram
MCF5272 ColdFire
®
Operand Y
Integrated Microprocessor User’s Manual, Rev. 3
Accumulator
Shift 0,1,-1
+/-
X
Unit.”
Operand X
ColdFire Core
2-3
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