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KS8993M Datasheet(PDF) 66 Page - Micrel Semiconductor

Part No. KS8993M
Description  Integrated 3-Port 10/100 Managed Integrated 3-Port 10/100 Managed
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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KS8993M Datasheet(HTML) 66 Page - Micrel Semiconductor

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Micrel, Inc.
KS8993M/ML/MI
April 2005
66
M9999-041205
Register 117 (0x75): Indirect Data Register 3
Bit
Name
R/W
Description
Default
31-24
Indirect data
R/W
Bit of 31-24 of indirect data
0000_0000
Register 118 (0x76): Indirect Data Register 2
Bit
Name
R/W
Description
Default
23-16
Indirect data
R/W
Bit 23-16 of indirect data
0000_0000
Register 119 (0x77): Indirect Data Register 1
Bit
Name
R/W
Description
Default
15-8
Indirect data
R/W
Bit 15-8 of indirect data
0000_0000
Register 120 (0x78): Indirect Data Register 0
Bit
Name
R/W
Description
Default
7-0
Indirect data
R/W
Bit 7-0 of indirect data
0000_0000
Registers 121 to 127
Registers 121 to 127 are Reserved.
Static MAC Address Table
The KS8993M has both a static and a dynamic MAC address table. When a destination address (DA) lookup is
requested, both tables are searched to make a packet forwarding decision. When a SA lookup is requested, only
the dynamic table is searched for aging, migration and learning purposes. The static DA lookup result will have
precedence over the dynamic DA lookup result. If there is a DA match in both tables, the result from the static
table will be used. The static table can be accessed and controlled by an external processor via the SMI, SPI and
I
2C interfaces. The external processor performs all addition, modification and deletion of static table entries.
These entries in the static table will not be aged out by the KS8993M.
Bit
Name
R/W
Description
Default
57-54
FID
R/W
Filter VLAN ID, representing one of the 16 active
VLANs
0000
53
Use FID
R/W
= 1, use (FID+MAC) to look up in static table
= 0, use MAC only to look up in static table
0
52
Override
R/W
= 1, override port setting “transmit enable=0” or
“receive enable=0” setting
= 0, no override
0
51
Valid
R/W
= 1, this entry is valid, the lookup result will be
used
= 0, this entry is not valid
0
Table 12. Format of Static MAC Table (8 Entries)


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