KSZ8893-MQL Micrel Semiconductor, Inc., KSZ8893-MQL Datasheet - Page 88

• Manufacturer Part Number: KSZ8893-MQL
• Description: Integrated 3-Port 10/100 Managed Switch with PHYs
• Manufacturer: Micrel Semiconductor, Inc.

Dynamic MAC Address Table
The KSZ8893MQL maintains the dynamic MAC address table. Read access is allowed only.
Micrel
November 2005
Bit
71
70-67
66
65-56
55-54
53-52
51-48
47-0
2. VLAN Table Write (write the 7
Example:
Dynamic MAC Address Table Read (read the 1
Then,
Write to reg. 129 (0x81), VLAN table bits [19:16]
Write to reg. 130 (0x82), VLAN table bits [15:8]
Write to reg. 131 (0x83), VLAN table bits [7:0]
Write to reg. 121 (0x79) with 0x04
Write to reg. 122 (0x7A) with 0x06
Write to reg. 121 (0x79) with 0x18
Write to reg. 122 (0x7A) with 0x00
Read reg. 123 (0x7B), bit [7]
Read reg. 124 (0x7C), dynamic table bits [63:56]
Read reg. 125 (0x7D), dynamic table bits [55:48]
Read reg. 126 (0x7E), dynamic table bits [47:40]
Read reg. 127 (0x7F), dynamic table bits [39:32]
Read reg. 128 (0x80), dynamic table bits [31:24]
Read reg. 129 (0x81), dynamic table bits [23:16]
Read reg. 130 (0x82), dynamic table bits [15:8]
Read reg. 131 (0x83), dynamic table bits [7:0]
Name
Data Not
Ready
Reserved
MAC Empty
No of Valid
Entries
Time Stamp
Source Port
FID
MAC Address
Table 18. Format of Dynamic MAC Address Table (1K Entries)
R/W
RO
RO
RO
RO
RO
RO
RO
RO
dynamic table bits [66:64]
48-bit MAC Address
Description
= 1, entry is not ready, continue retrying until this
bit is set to 0
= 0, entry is ready
Reserved
= 1, there is no valid entry in the table
= 0, there are valid entries in the table
Indicates how many valid entries in the table
2 bits counter for internal aging
The source port where FID+MAC is learned
Filter ID
th
entry)
0x3ff means 1K entries
0x001 means 2 entries
0x000 and bit 66 = 0 means 1 entry
0x000 and bit 66 = 1 means 0 entry
00 : port 1
01 : port 2
10 : port 3
88
st
entry and retrieve the MAC table size)
// Write VLAN table selected
// Trigger the write operation
// Read dynamic table selected
// Trigger the read operation
// if bit 7 = 1, restart (reread) from this register
Default
1
00_0000_0000
00
0x0
0x0000_0000_0000
KSZ8893MQL/MQLI
M9999-111705