DM9016EP datasheet(67/85 Pages) DAVICOM

67 / 85 page

DM9016

3-port switch with Processor Interface

Preliminary datasheet

DM9016-13-DS-P01

March 26, 2009

9.2.16 Access Rules of Address Table

The DM9016 The procedure and flow chart of Entry

Write is described as following:

Entry Write

(1). Check the busy bit of Ethernet Address

Control/Status Register 1 (Reg70H.0) to seek

the availability of access engine. Waiting until

engine is available and to keep on following.

(2). Write the MAC address to the Ethernet Address

Data Registers (Reg71H~76H).

(3). Write the Port Number (if target is unicast

address table) or Port Map (if target is multicast

address table) to Ethernet Address Data

(4). If need, write the entry’s attributes that includes

both static and overriding to Ethernet Address

Control/Status Register 1 (Reg77H).

(5). Write the “WRITE” command and assign the

target table to Ethernet Address Control/Status

(6). Check the busy bit again, wait for available.

(7). Read the command status from Ethernet

Address

Control/Status

(Reg70H.[6:5]).

Entry Delete

(1). Check the busy bit of Ethernet Address

Control/Status Register 1 (Reg70H.0) to seek

the availability of access engine. Waiting until

engine is available and to keep on following.

(2). Write the MAC address to the Ethernet Address

Data Register (Reg71H~76H).

(3). Write the “DELETE” command and assign the

target table to Ethernet Address Control/Status

(4). Check the busy bit again, wait for available.

(5). Read the command status from Ethernet

Address

Control/Status

(Reg70H.[6:5]).

Entry Search

(1). Check the busy bit of Ethernet Address

Control/Status Register 1 (Reg70H.0) to seek

the availability of access engine. Waiting until

engine is available and to keep on following.

(2). Write the MAC address to the Ethernet Address

Data Register (Reg71H~76H).

(3). Write the “SEARCH” command and assign the

target table to Ethernet Address Control/Status

(4). Check the busy bit again, wait for available.

(5). Read the command status from Ethernet

Address

Control/Status

(Reg70H.[6:5]).

(6). Read the Port Number or Port Map from

Ethernet Address Control/Status Register 2

(Reg77H.[3:0])

(7). If need, read the entry sequence (the sequence

number of entry in address table) from Ethernet

Address Data Register (Reg71H~72H).

(8). If need, read the entry’s attributes that include

static (unicast address table only), IGMP

signature (multicast address table only) and

overriding from Ethernet Address Control/Status

Entry Read

(1). Check the busy bit of Ethernet Address

Control/Status Register 1 (Reg70H.0) to seek

the availability of access engine. Waiting until

engine is available and to keep on following.

(2). Write the entry sequence to the Ethernet

Address Data Register (Reg71H~76H).

(3). Write the “READ” command and assign the

target table to Ethernet Address Control/Status

(4). Check the busy bit again, wait for available.

(5). Read the command status from Ethernet

Address Control/Status Register 1 (70H.[6:5]).

(6). Read the Port Number or Port Map from

Ethernet Address Control/Status Register 2

(Reg77H.[3:0])

(7). If target is unicast or multicast address table,

read the entry’s MAC address from Ethernet

Address Data Register (Reg71H~76H). If target

is IGMP membership table, read the entry

DM9016EP Datasheet(PDF) 67 Page - Davicom Semiconductor, Inc.

DM9016EP Datasheet(HTML) 67 Page - Davicom Semiconductor, Inc.

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