KSZ8993M-EVAL Micrel Inc, KSZ8993M-EVAL Datasheet - Page 70

• Manufacturer Part Number: KSZ8993M-EVAL
• Description: KSZ8993M Evaluation Board - For Experimental Use Only
• Manufacturer: Micrel Inc

Specifications of KSZ8993M-EVAL

• Lead Free Status / RoHS Status: Supplier Unconfirmed

MIB (Management Information Base) Counters
The KSZ8993M provides 34 MIB counters per port. These counters are used to monitor the port activity for
network management. The MIB counters have two format groups: “Per Port” and “All Port Dropped Packet.”
“Per Port” MIB counters are read using indirect memory access. The base address offsets and address ranges for
all three ports are:
Micrel, Inc.
October 2008
Bit
66
65-56
55-54
53-52
51-48
47-0
Bit
31
30
29-0
Port 1, base is 0x00 and range is (0x00-0x1f)
Port 2, base is 0x20 and range is (0x20-0x3f)
Port 3, base is 0x40 and range is (0x40-0x5f)
Example:
Dynamic MAC Address Table Read (read the 1
Then
Write to reg. 110 with 0x18 (read dynamic table selected)
Write to reg. 111 with 0x00 (trigger the read operation)
Read reg. 112 (71-64) // if bit 71 = 1, restart (reread) from this register
Read reg. 113 (63-56)
Read reg. 114 (55-48)
Read reg. 115 (47-40)
Read reg. 116 (39-32)
Read reg. 117 (31-24)
Read reg. 118 (23-16)
Read reg. 119 (15-8)
Read reg. 120 (7-0)
Name
Reserve
Count valid
Counter values
Name
MAC empty
No of valid
entries
Time stamp
Source port
FID
MAC address
Table 14. Format of Dynamic MAC Address Table (1K Entries) (continued)
R/W
RO
RO
RO
RO
RO
RO
R/W
RO
RO
RO
Table 15. Format of “Per Port” MIB Counters
The source port where FID+MAC is learned
Description
= 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
00, port 1
01, port 2
10, port 3
Filter ID
48 bits MAC address
Description
Reserve
= 1, counter value is valid
= 0, counter value is not valid
Counter value
0x3ff means 1 K entries
0x001 means 2 entries
0x000 and bit 66 = 0 means 1 entry
0x000 and bit 66 = 1 means 0 entry
70
st
entry and retrieve the MAC table size)
Default
1
00_0000_0000
00
0x0
0x0000_0000_0000
Default
0
0
0
M9999-020606
KSZ8993M/ML