mu9c8338a Music Semiconductors, Inc., mu9c8338a Datasheet - Page 17

• Manufacturer Part Number: mu9c8338a
• Description: Mu9c8338a 10/100mb Ethernet Filter Interface
• Manufacturer: Music Semiconductors, Inc.

Port Configure Extended Register
Table 25: PCFG_EXT: Port Configure Extended Register Mapping
Rev. 0a
Name
Default_Multicast_Action
DA_Processing_Enable
SA_Processing_Enable
Permanent_Check
RESERVED
[15:4]
Bits
0
1
2
3
Description
If a DA processing function is performed on a Multicast group address, the packet is treated in the
following way if the DA is not found in the LANCAM database:
0 = Drop. The REJ signal is asserted. This will inform external hardware (MAC) that the Multicast
packet should be rejected (not forwarded).
1 = Pass. The REJ signal is not asserted.
Bit 1 must be set; otherwise no Multicast DA processing function is performed.
0 = Disable. Multicast DAs are not processed
1 = Enable. Multicast DAs are processed in the same way as Unicast DAs
0 = Disable. SAs from a packet deemed to have a Multicast DA are not processed.
1 = Enable. SAs from a packet deemed to have a Multicast DA are processed.
0 = The permanent bit of a matching MAC address will not be checked during the SA Learn built-in
routine.
1 = The SA Learn routine will read the associated data of the matching LANCAM entry to check the
Permanent bit. If set, the SA will not be updated. If not set, the entry will be updated as normal.
Reserved = Write as 0H. When reading, these bits will read as 0H
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