Figure 773. Ethernet Address Recognition—Receive Block Decisions - STMicroelectronics SPC572L series Reference Manual

RM0400
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 773. Ethernet address recognition—receive block decisions
Accept/Reject
True
Broadcast Addr
BC_REJ = 1
?
True
False
PROM = 1
Reject Frame
Flush from FIFO
DocID027809 Rev 4
Frame
False
?
Receive
Address
Recognition
Hash Match
?
False
Exact Match
?
False
True
?
Receive Frame
Set M (Miss) bit in RCV BD
Set MC bit in RCV BD if multicast
Set BC bit in RCV BD if broadcast
Fast Ethernet Controller (FEC)
True
Receive Frame
Set MC bit in RCV BD if multicast
True
True
Pause Frame
?
False
Reject Frame
Flush from FIFO
Receive Frame
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