DM9106 datasheet(30/92 Pages) DAVICOM

30 / 92 page

DM9106

3-port switch with PCI Interface

Preliminary datasheet

DM9106-DS-P01

July 9, 2009

IAFM

0,RO

Inverse Address Filtering Mode

It is set to indicate the DM9106 operate in a Inverse Filtering Mode. This is a

only bit and mapped from the setup frame together with CR6<2>, CR6<0>

setting. That is it is valid only during perfect filtering mode.

PBF

0,RW

Pass Bad Frame

When set, the DM9106 is indicated to receive the bad frames including

runt packets, truncated frames caused by the FIFO overflow.

The bad frame also has to pass the address filtering if the

DM9106 is not set in promiscuous mode.

HOFM

0,RO

Hash-only Filter Mode

This is a read-only bit and mapped from the set-up frame together with

bit4,0 of CR6.It is set to indicate the DM9106 operate in a Hash-only

Filtering Mode.

RXRC

0,RW

Receive Start/Stop Command

When set, the receive process will begin by fetching the receive descriptor

for available buffer to store the new-coming packet (placed in the running

state). If the fetched descriptor is owned by the host (no descriptor is

owned by the DM9106), the receive process will enter the suspend state

and receive buffer unavailable CR5<7> sets. Otherwise it runs to wait for

the packet’s income. When reset, the receive process is placed in the

stopped state after completing the reception of the current frame.

HPFM

0,RO

Hash/Perfect Filter Mode

This is a read only bit and mapped from the setup frame together with

CR6<4>, CR6<2>. When reset, the DM9106 does a perfect address filter

of incoming frames according to the addresses specified in the setup

frame. When set, the DM9106 does a imperfect address filtering for the

incoming frame with a multicast address according to the hash table

specified in the setup frame. The filtering mode (perfect/imperfect) for the

frame with a physical address will depend on CR6<2>.

DM9106 Datasheet(PDF) 30 Page - Davicom Semiconductor, Inc.

DM9106 Datasheet(HTML) 30 Page - Davicom Semiconductor, Inc.

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