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Micrel KSZ8895 Specifications Page 96

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Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Dynamic MAC Address Table
This table is read only. The contents are maintained by the KSZ8895MQ/RQ/FMQ only.
Address Name Description Mode Default
Format of Dynamic MAC Address Table (1K entries)
71 MAC Empty
1, there is no valid entry in the table.
0, there are valid entries in the table.
RO 1
70−61
No of Valid Entries
Indicates how many valid entries in the table.
0x3ff means 1K entries
0x1 and bit 71 = 0: means 2 entries
0x0 and bit 71 = 0: means 1 entry
0x0 and bit 71 = 1: means 0 entry
RO 0
60-59 Time Stamp 2-bit counters for internal aging RO
58-56 Source Port
The source port where FID+MAC is learned.
000 Port 1
001 Port 2
010 Port 3
011 Port 4
100 Port 5
RO 0x0
55 Data Ready
1, The entry is not ready, retry until this bit is set to 0.
0, The entry is ready.
RO
54−48
FID Filter ID. RO 0x0
47−0
MAC Address 48-bit MAC address. RO 0x0
Table 18. Dynamic MAC Address Table
Examples:
(1) Dynamic MAC Address Table Read (read the 1
st
entry), and retrieve the MAC table size
Write to Register 110 with 0x18 (read dynamic table selected)
Write to Register 111 with 0x0 (trigger the read operation) and then
Read Register 112 (71-64)
Read Register 113 (63-56); // the above two registers show # of entries
Read Register 114 (55-48) // if bit 55 is 1, restart (reread) from this register
Read Register 115 (47-40)
Read Register 116 (39-32)
Read Register 117 (31-24)
Read Register 118 (23-16)
Read Register 119 (15-8)
Read Register 120 (7-0)
(2) Dynamic MAC Address Table Read (read the 257
th
entry), without retrieving # of entries information
Write to Register 110 with 0x19 (read dynamic table selected)
Write to Register 111 with 0x1 (trigger the read operation) and then
Read Register 112 (71-64)
Read Register 113 (63-56)
Read Register 114 (55-48) // if bit 55 is 1, restart (reread) from this register
Read Register 115 (47-40)
Read Register 116 (39-32)
Read Register 117 (31-24)
Read Register 118 (23-16)
Read Register 119 (15-8)
Read Register 120 (7-0)
March 12, 2014
96
Revision 1.7
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