KSZ8842-16MBL-EVAL MICREL [Micrel Semiconductor], KSZ8842-16MBL-EVAL Datasheet - Page 120

• Manufacturer Part Number: KSZ8842-16MBL-EVAL
• Description: 2-Port Ethernet Switch with Non-PCI Interface
• Manufacturer: MICREL [Micrel Semiconductor]

Dynamic MAC Address Table
The Dynamic MAC address is a read only table.
Dynamic MAC Address Lookup Example:
Micrel, Inc.
Bit
71
70-67
66
65-56
55-54
53-52
51-48
47-0
October 2007
Dynamic MAC Address Table Read (read the first entry at indirect address offset 0 and retrieve the MAC
table size)
Then
Default Value
1
00
0x0000_0000_
0000
0x000
0x0
Write to reg. IACR with 0x1800 (set indirect address and trigger a read dynamic MAC table operation)
Read reg. IADR1 (dynamic MAC table bits 71-64) // If bit 71 = 1, restart (reread) from this register
Read reg. IADR3 (dynamic MAC table bits 63-48)
Read reg. IADR2 (dynamic MAC table bits 47-32)
Read reg. IADR5 (dynamic MAC table bits 31-16)
Read reg. IADR4 (dynamic MAC table bits 15-0)
R/W
RO
RO
RO
RO
RO
RO
RO
RO
Table 19. Dynamic MAC Address Table Format (1024 Entries)
Description
Data not ready
1: specifies that the entry is not ready, continue retrying until bit is set to 0
0: specifies that the entry is ready
Reserved
MAC empty
1: specifies that there is no valid entry in the table
0: specifies that there are valid entries in the table
No of valid entries
Indicates how many valid entries in the table
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
Time Stamp
Specifies the 2-bit counter for internal aging.
Source port
Identifies the source port where FID+MAC is learned:
00: port 1
01: port 2
10: port 3
FID
Specifies the filter ID.
MAC Address
Specifies the 48-bit MAC address.
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KSZ8842-16/32 MQL/MVL/MVLI/MBL
M9999-102207-1.9