MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 225

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

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

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