MCF5282CVF80J Freescale Semiconductor, MCF5282CVF80J Datasheet - Page 161
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MCF5282CVF80J
Manufacturer Part Number
MCF5282CVF80J
Description
IC MPU 512K FLASH 256MAPBGA
Manufacturer
Freescale Semiconductor
Series
MCF528xr
Datasheet
1.MCF5216CVM66J.pdf
(766 pages)
Specifications of MCF5282CVF80J
Core Processor
Coldfire V2
Core Size
32-Bit
Speed
80MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, SPI, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
150
Program Memory Size
512KB (512K 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
Contains lead / RoHS non-compliant
Eeprom Size
-
Lead Free Status / Rohs Status
No
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCF5282CVF80J
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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8.5.2
There are two modes of arbitration: fixed and round-robin. This section discusses the differences between
them.
8.5.2.1
Round-robin arbitration is the default mode after reset. This scheme cycles through the sequence of
masters as specified by MPARK[Mn_PRTY] bits. Upon completion of a transfer, the master is given the
lowest priority and the priority for all other masters is increased by one.
If no masters are requesting, the arbitration unit must “park”, pointing at one of the masters. There are two
possibilities, park the arbitration unit on the last active master, or park pointing to the highest priority
master. Setting MPARK[PRK_LAST] causes the arbitration pointer to be parked on the highest priority
master. In round-robin mode, programming the timeout enable and lockout bits MPARK[13,11:8] will
have no effect on the arbitration.
8.5.2.2
In fixed arbitration the master with highest priority (as specified by the MPARK[Mn_PRTY] bits) will win
the bus. That master will relinquish the bus when all transfers to that master are complete.
If MPARK[TIMEOUT] is set, a counter will increment for each master for every cycle it is denied access.
When a counter reaches the limit set by MPARK[LCKOUT_TIME], the arbitration algorithm will be
changed to round-robin arbitration mode until all locks are cleared. The arbitration will then return to fixed
mode and the highest priority master will be granted the bus.
As in round-robin mode, if no masters are requesting, the arbitration pointer will park on the highest
priority master if MPARK[PRK_LAST] is set, or will park on the master which last requested the bus if
cleared.
8.5.3
The MPARK controls the operation of the system bus arbitration module. The platform bus master
connections are defined as:
Freescale Semiconductor
•
•
•
•
next +1
next +2
next +3
Master 3 (M3): Fast Ethernet Controller (Not used for the MCF5216 and MCF5214)
Master 2 (M2): 4-channel DMA
Master 1 (M1): Internal Bus Master (not used in normal user operation)
Master 0 (M0): V2 ColdFire Core
Arbitration Algorithms
Bus Master Park Register (MPARK)
Round-Robin Mode
Fixed Mode
M3 = 11 M2 =01 M1 = 10 M0 = 00
M3 = 00 M2 =10 M1 = 11 M0 = 01
M3 = 01 M2 =11 M1 = 00 M0 = 10
M3 = 10 M2 =00 M1 = 01 M0 = 11
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
System Control Module (SCM)
8-9
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