MCF5281CVM66J Freescale Semiconductor, MCF5281CVM66J Datasheet - Page 91
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MCF5281CVM66J
Manufacturer Part Number
MCF5281CVM66J
Description
IC MPU 256K FLASH 256MAPBGA
Manufacturer
Freescale Semiconductor
Series
MCF528xr
Datasheet
1.MCF5216CVM66J.pdf
(766 pages)
Specifications of MCF5281CVM66J
Core Processor
Coldfire V2
Core Size
32-Bit
Speed
66MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, SPI, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
150
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
256-MAPBGA
Processor Series
MCF528x
Core
ColdFire V2
3rd Party Development Tools
JLINK-CF-BDM26, EWCF
Development Tools By Supplier
NNDK-MOD5282-KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCF5281CVM66J
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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3.3.3
The instruction execution times for the EMAC can be found in
Execution
The EMAC execution pipeline overlaps the AGEX stage of the OEP (the first stage of the EMAC pipeline
is the last stage of the basic OEP). EMAC units are designed for sustained, fully-pipelined operation on
accumulator load, copy, and multiply-accumulate instructions. However, instructions that store contents
of the multiply-accumulate programming model can generate OEP stalls that expose the EMAC execution
pipeline depth:
The MOVE.L instruction that stores the accumulator to an integer register (Rz) stalls until the
program-visible copy of the accumulator is available.
In
minus 1. The minus 1 factor is needed because the OEP and EMAC pipelines overlap by a cycle, the
AGEX stage. As the store-accumulator instruction reaches the AGEX stage where the operation is
performed, the recently updated accumulator 0 value is available.
Freescale Semiconductor
Load Accumulator
Extensions 23
Store Accumulator
Extensions 01
Store Accumulator
Extensions 23
Figure
mac.w
move.l
Command
3-9, the OEP stalls the store-accumulator instruction for three cycles: the EMAC pipleline depth
Times”.
EMAC Instruction Execution Times
Ry, Rx, Acc0
Acc0, Rz
AGEX
EMAC EX1
EMAC EX3
EMAC EX4
Accumulator 0
DSOC
EMAC EX2
move.l {Ry,#imm},ACCext23 Loads the accumulator 2,3 extension bytes with a 32-bit
move.l ACCext01,Rx
move.l ACCext23,Rx
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Table 3-8. EMAC Instruction Summary (continued)
Figure 3-9. EMAC-Specific OEP Sequence Stall
Mnemonic
mac
mac
mac
regBusy stall
Three-cycle
move
mac
operand
Writes the contents of accumulator 0,1 extension bytes into a
CPU register
Writes the contents of accumulator 2,3 extension bytes into a
CPU register
Figure 3-9
old
mac
Section 2.3.5.6, “EMAC Instruction
shows EMAC timing.
move
mac
Enhanced Multiply-Accumulate Unit (EMAC)
Description
move
move
new
3-13
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