KSZ9567R_V01 datasheet(193/233 Pages) MICROCHIP

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DS00002329E-page 193

KSZ9567R

5.3.2.5

Static Address Table Entry 3 Register

5.3.2.6

Static Address Table Entry 4 Register

5.3.3

RESERVED MULTICAST ADDRESS TABLE

The Reserved Multicast Address Table determines the forwarding ports for 48 specific multicast addresses. The table

is addressed by the least significant 6 bits of the multicast address, and the table contents are the bits (the PORT_FOR-

WARD field) that represent each possible forwarding port of the device. It is not addressed by the group number in the

first column of Table 4-6. Note that the 48 addresses are organized into 8 fixed groups, and changing a forwarding port

for one address also makes the same change for all other addresses in the same group.

The Reserved Multicast Table is accessed in the same manner as the Static Address Table, using the same indirect

access registers. The Static Address and Reserved Multicast Table Control Register is used for indexing and read/write

control, while the Reserved Multicast Address Table Entry 2 Register is used for the data fields.

5.3.3.1

Reserved Multicast Table Write Operation

Write the PORT_FORWARD value to the Reserved Multicast Address Table Entry 2 Register.

Write to the Static Address and Reserved Multicast Table Control Register.

a) Write the TABLE_INDEX field with the 6-bit index value.

b) Set the TABLE_SELECT bit to 1 to select the Reserved Multicast Table.

c) Set the ACTION bit to 0 to indicate a write operation.

d) Set the START_FINISH bit to 1 to initiate the operation.

When the operation is complete, the START_FINISH bit will be cleared automatically.

5.3.3.2

Reserved Multicast Table Read Operation

Write to the Static Address and Reserved Multicast Table Control Register.

a) Write the TABLE_INDEX field with the 6-bit index value.

b) Set the TABLE_SELECT bit to 1 to select the Reserved Multicast Table.

c) Set the ACTION bit to 1 to indicate a read operation.

d) Set the START_FINISH bit to 1 to initiate the operation.

When the operation is complete, the START_FINISH bit will be cleared automatically.

a) Read the contents of the indexed entry from the Reserved Multicast Address Table Entry 2 Register.

Address:

0x0428 - 0x042B

Size:

32 bits

Bits

Description

Type

Default

31:23

RESERVED

0x000

22:16

FID

VLAN group ID for matching

R/W

000_0000b

15:0

MAC Address [47:32]

R/W

0x0000

Address:

0x042C - 0x042F

Size:

32 bits

Bits

Description

Type

Default

31:0

MAC Address [31:0]

R/W

0x00000000

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