MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 225
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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In promiscuous mode (PROM = 1 in RCR), the FEC receives all of the incoming frames regardless of their
address. In this mode, the destination address lookup is still performed and RxBD[MISS] is set
accordingly. If address recognition did not achieve a match, the frame is received with RxBD[MISS] set.
If address recognition achieves a match, the frame is received without setting RxBD[MISS].
Freescale Semiconductor
.
Address Type
Destination
broadcast
individual
group
Receive Frame
Receive Frame
The FEC compares the destination address field of the received frame with the 48-bit MAC address
programmed into MALR and MAUR.
The FEC determines whether or not the group address is a broadcast address. If not broadcast, a hash table
lookup is performed using the 64-entry hash table defined in HTLR and HTUR.
The frame is accepted unconditionally.
MCF5272 ColdFire
Figure 11-4. Ethernet Address Recognition Flowchart
True
True
Table 11-3. Ethernet Address Recognition
Check Address
Discard Frame
Promiscuous
I/G Address
Hash Match
Broadcast
®
Address
Mode
Integrated Microprocessor User’s Manual, Rev. 3
?
?
?
?
G
False
False
False
(RCR[PROM] = 0)
False
FEC Address Processing
I
True (RCR[PROM] = 1)
Perfect Match
?
True
Receive Frame
Set Miss Bit
Receive Frame
Ethernet Module
11-7
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