KSZ8873MLL AM Micrel Inc, KSZ8873MLL AM Datasheet - Page 81

• Manufacturer Part Number: KSZ8873MLL AM
• Description: IC ETHERNET SWITCH 3PORT 64-LQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8873MLL AM

• Controller Type: Ethernet Switch Controller
• Interface: MII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / RoHS Status: Not Compliant, Lead free / RoHS Compliant
• Other names: 576-3633; KSZ8873MLL AM; KSZ8873MLLAM

Micrel, Inc.
Static MAC Address Table
The KSZ8873 supports both a static and a dynamic MAC address table. In response to a Destination Address (DA) look
up, the KSZ8873 searches both tables to make a packet forwarding decision. In response to a Source Address (SA) look
up, only the dynamic table is searched for aging, migration and learning purposes.
The static DA look up result takes precedence over the dynamic DA look up result. If there is a DA match in both tables,
the result from the static table is used. The entries in the static table will not be aged out by the KSZ8873.
The static table is accessed by a external processor via the SMI, SPI or I2C interfaces. The external processor performs
all addition, modification and deletion of static MAC table entries.
Examples:
September 2009
1. Static Address Table Read (Read the 2
Then,
Bit
57-54
53
52
51
50-48
47-0
Write to reg. 121 (0x79) with 0x10
Write to reg. 122 (0x7A) with 0x01
Read reg. 124 (0x7C), static table bits [57:56]
Read reg. 125 (0x7D), static table bits [55:48]
Read reg. 126 (0x7E), static table bits [47:40]
Read reg. 127 (0x7F), static table bits [39:32]
Read reg. 128 (0x80), static table bits [31:24]
Read reg. 129 (0x81), static table bits [23:16]
Read reg. 130 (0x82), static table bits [15:8]
Read reg. 131 (0x83), static table bits [7:0]
Name
FID
Use FID
Override
Valid
Forwarding
Ports
MAC Address
Table 15. Format of Static MAC Table (8 Entries)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Filter VLAN ID – identifies one of the 16 active VLANs
=1, Use (FID+MAC) for static table look ups
=0, Use MAC only for static table look ups
=1, Override port setting “transmit enable=0” or
“receive enable=0” setting
=0, No override
=1, This entry is valid, the lookup result will be used
=0, This entry is not valid
These 3 bits control the forwarding port(s):
48-bit MAC Address
nd
Entry)
001, forward to port 1
010, forward to port 2
100, forward to port 3
011, forward to port 1 and port 2
110, forward to port 2 and port 3
101, forward to port 1 and port 3
111, broadcasting (excluding the
ingress port)
81
// Read static table selected
// Trigger the read operation
KSZ8873MLL/FLL/RLL
Default
0000
0
0
0
000
0x0000_0
000_0000
M9999-092309-1.2