ENC424J600 datasheet(98/168 Pages) MICROCHIP

98 / 168 page

ENC424J600/624J600

DS39935C-page 96

 2010 Microchip Technology Inc.

ERXFCON: ETHERNET RX FILTER CONTROL REGISTER

R/W-0

U-0

R/W-0

HTEN

MPEN

—

NOTPM

PMEN3

PMEN2

PMEN1

PMEN0

bit 15

bit 8

R/W-0

R/W-1

R/W-0

R/W-1

R/W-0

R/W-1

CRCEEN

CRCEN

RUNTEEN

RUNTEN

UCEN

NOTMEEN

MCEN

BCEN

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15

HTEN:

Hash Table Collection Filter Enable bit

= Accept packets having a hashed destination address that points to a set bit in the Hash Table(1)

= Filter is disabled

bit 14

MPEN:

Magic Packet™ Collection Filter Enable bit

= Accept packets containing a Magic Packet pattern for the local MAC address(1)

= Filter is disabled

bit 13

Unimplemented:

Read as ‘0’

bit 12

NOTPM:

Pattern Match Inversion Control bit

= Pattern Match checksum mismatch required for a successful Pattern Match

= Pattern Match checksum match required for a successful Pattern Match

bit 11-8

PMEN<3:0>:

Pattern Match Collection Filter Enable bits

When NOTPM = 0:

A packet is accepted by the filter if the pattern checksum matches AND the selected mode’s condition is

true.

When NOTPM = 1:

A packet is accepted by the filter if pattern checksum does not match AND the selected mode’s condition

is true.

1111

....

= Reserved

1010

1001

= Magic Packet for local Unicast address(1)

1000

= Hashed packet destination points to a bit in the Hash Table registers that is set(1)

0111

= Packet destination is not the Broadcast address(1)

0110

= Packet destination is the Broadcast address(1)

0101

= Packet destination is not a Multicast address(1)

0100

= Packet destination is a Multicast address(1)

0011

= Packet destination is not the local Unicast address(1)

0010

= Packet destination is the local Unicast address(1)

0001

= Accept all packets with a checksum match defined by NOTPM(1)

0000

= Filter is disabled

bit 7

CRCEEN:

CRC Error Collection Filter Enable bit

= Packets with an invalid CRC will be accepted, regardless of all other filter settings

= Filter is disabled

Note 1:

This filtering decision can be overridden by the CRC Error Rejection filter and Runt Error Rejection filter

decisions, if enabled, by CRCEN or RUNTEN.

This filtering decision can be overridden by the CRC Error Collection filter and Runt Error Collection filter

decisions, if enabled, by CRCEEN or RUNTEEN.

ENC424J600 Datasheet(PDF) 98 Page - Microchip Technology

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