Ethernet Address Recognition—Receive Block Decisions - Motorola ColdFire MCF5281 User Manual

Functional Description
False
Receive Frame
Set BC bit in RCV BD
NOTES:
BC_REJ - field in RCR register (BroadCast REJect)
PROM - field in RCR register (PROMiscous mode)
Pause Frame - valid PAUSE frame received
Figure 17-2. Ethernet Address Recognition—Receive Block Decisions
17-12
Accept/Reject
Frame
True
Broadcast Addr
?
BC_REJ = 1
?
True
False
PROM = 1
?
Reject Frame
Flush from FIFO
Set M (Miss) bit in Rcv BD
Set MC bit in Rcv BD if multicast
Set BC bit in Rcv BD if broadcast
MCF5282 User's Manual
False
Receive
Address
Recognition
True
Hash Match
?
False
Set MC bit in RCV BD if multicast
True
Exact Match
?
False
True
Receive Frame
Receive Frame
Receive Frame
True
Pause Frame
?
False
Reject Frame
Flush from FIFO
MOTOROLA