OM11077 NXP Semiconductors, OM11077 Datasheet - Page 269

• Manufacturer Part Number: OM11077
• Description: MODULE DIMM LPC2478 ARM7
• Manufacturer: NXP Semiconductors

Specifications of OM11077

• Accessory Type: Module Card
• For Use With/related Products: ARM-57TS-LPC2478
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4742

NXP Semiconductors
UM10237_4
User manual
Fig 33. Receive filter block diagram
AcceptMulticastHashEn
AcceptUnicastHashEn
AcceptMulticastEn
AcceptUnicastEn
HashFilter
Ethernet MAC will stop writing further data in the frame to memory; the FailFilter bit in the
status word of the frame will be set to indicate that the software device driver can discard
the frame immediately.
Unicast, broadcast and multicast
Generic filtering based on the type of frame (unicast, multicast or broadcast) can be
programmed using the AcceptUnicastEn, AcceptMulticastEn, or AcceptBroadcastEn bits
of the RxFilterCtrl register. Setting the AcceptUnicast, AcceptMulticast, and
AcceptBroadcast bits causes all frames of types unicast, multicast and broadcast,
respectively, to be accepted, ignoring the Ethernet destination address in the frame. To
program promiscuous mode, i.e. to accept all frames, set all 3 bits to 1.
Perfect address match
When a frame with a unicast destination address is received, a perfect filter compares the
destination address with the 6 byte station address programmed in the station address
registers SA0, SA1, SA2. If the AcceptPerfectEn bit in the RxFilterCtrl register is set to 1,
and the address matches, the frame is accepted.
Imperfect hash filtering
IMPERFECT
FILTER
HASH
FReady
Rev. 04 — 26 August 2009
StationAddress
AcceptPerfectEn
packet
FMatch
PERFECT
ADDRESS
FILTER
RxFilterEnWoL
Chapter 11: LPC24XX Ethernet
CRC
OK?
RxFilterWoL
UM10237
© NXP B.V. 2009. All rights reserved.
RxAbort
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