KS8995MA-EVAL Micrel Inc, KS8995MA-EVAL Datasheet - Page 58

• Manufacturer Part Number: KS8995MA-EVAL
• Description: BOARD EVAL EXPERIMENT KS8995MA
• Manufacturer: Micrel Inc

Specifications of KS8995MA-EVAL

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 576-1018

Semptember 2008
Static MAC Address
KS8995MA/FQ has a static and a dynamic address table. When a DA look-up is requested, both tables will be
searched to make a packet forwarding decision. When an SA look-up is requested, only the dynamic table is
searched for aging, migration, and learning purposes. The static DA look-up result will have precedence over the
dynamic DA look-up result. If there are DA matches in both tables, the result from the static table will be used. The
static table can only be accessed and controlled by an external SPI master (usually a processor). The entries in the
static table will not be aged out by KS8995MA/FQ. An external device does all addition, modification and deletion.
Note:
Register bit assignments are different for static MAC table reads and static MAC table write, as shown in the two tables below.
Address
Format of Static MAC Table for Reads (8 entries)
60-57
56
55
54
53
52-48
47-0
Format of Static MAC Table for Writes (8 entries)
59-56
55
54
53
52-48
47-0
Name
FID
Use FID
Reserved
Override
Valid
Forwarding Ports
MAC Address
FID
Use FID
Override
Valid
Forwarding Ports
MAC Address
Description
Filter VLAN ID, representing one of the 16 active
VLANs
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
Reserved.
1, override spanning tree “transmit enable = 0” or
“receive enable = 0* setting. This bit is used for
spanning tree implementation.
0, no override.
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
The 5 bits control the forward ports, example:
00001, forward to port 1
00010, forward to port 2
…..
10000, forward to port 5
00110, forward to port 2 and port 3
11111, broadcasting (excluding the ingress port)
48 bit MAC address.
Filter VLAN ID, representing one of the 16 active
VLANs.
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
1, override spanning tree “transmit enable = 0” or
“receive enable = 0” setting. This bit is used for
spanning tree implementation.
0, no override.
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
The 5 bits control the forward ports, example:
00001, forward to port 1
00010, forward to port 2
.....
10000, forward to port 5
00110, forward to port 2 and port 3
11111, broadcasting (excluding the ingress port)
48-bit MAC address.
Table 10. Static MAC Address Table
58
Mode
RO
RO
RO
RO
RO
RO
RO
W
W
W
W
W
W
M9999-091508
Default
00000
00000
0000
0000
N/A
0x0
0x0
0
0
0
0
0
0