KSZ8893FQL-FX Micrel Inc, KSZ8893FQL-FX Datasheet - Page 99

• Manufacturer Part Number: KSZ8893FQL-FX
• Description: 2+1 Port 10/100 Switch W/Tranceivers & Frame Buffers, ( )
• Manufacturer: Micrel Inc

Specifications of KSZ8893FQL-FX

• Controller Type: Ethernet Switch Controller
• Interface: MII, RMII, SNI
• Voltage - Supply: 3.1 V ~ 3.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Number Of Primary Switch Ports: 3
• Internal Memory Buffer Size: 32
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Temperature Classification: Commercial
• Data Rate: 1000Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1603 - EVAL KIT EXPERIMENTAL KSZ8893MQL
• Current - Supply: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-3273

Micrel, Inc.
VLAN Table
The KSZ8893FQL uses the VLAN table to perform look-ups. If 802.1Q VLAN mode is enabled (register 5, bit 7 = 1),
this table will be used to retrieve the VLAN information that is associated with the ingress packet. This information
includes FID (filter ID), VID (VLAN ID), and VLAN membership as described in the following table.
If 802.1Q VLAN mode is enabled, then the KSZ8893FQL will assign a VID to every ingress packet. If the packet is
untagged or tagged with a null VID, the packet is assigned with the default port VID of the ingress port. If the packet is
tagged with non null VID, the VID in the tag will be used. The look-up process will start from the VLAN table look-up. If
the VID is not valid, the packet will be dropped and no address learning will take place. If the VID is valid, the FID is
retrieved. The FID+DA and FID+SA look-ups are performed. The FID+DA look-up determines the forwarding ports. If
FID+DA fails, the packet will be broadcast to all the members (excluding the ingress port) of the VLAN. If FID+SA fail,
the FID+SA will be learned.
Examples:
October 2007
1. VLAN Table Read (read the 3
2. VLAN Table Write (write the 7
18-16
15-12
11-0
Bit
19
Then,
Name
Valid
Membership
FID
VID
Write to reg. 121 (0x79) with 0x14
Write to reg. 122 (0x7A) with 0x02
Read reg. 129 (0x81), VLAN table bits [19:16]
Read reg. 130 (0x82), VLAN table bits [15:8]
Read reg. 131 (0x83), VLAN table bits [7:0]
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
Table 22. Format of Static VLAN Table (16 Entries)
R/W
R/W
R/W
R/W
R/W
rd
th
entry)
entry)
Description
1 = Entry is valid
0 = Entry is invalid
Specify which ports are members of the VLAN. If a DA lookup
fails (no match in both static and dynamic tables), the packet
associated with this VLAN will be forwarded to ports specified
in this field. For example, 101 means port 3 and 1 are in this
VLAN.
Filter ID. KSZ8893FQL supports 16 active VLANs represented
by these four bit fields. FID is the mapped ID. If 802.1Q VLAN
is enabled, the look up will be based on FID+DA and FID+SA.
IEEE 802.1Q 12 bits VLAN ID
99
// Read VLAN table selected
// Trigger the read operation
// Write VLAN table selected
// Trigger the write operation
M9999-101607-1.3
KSZ8893FQL
Default
0x001
111
0x0
1