KSZ8873MLL AM Micrel Inc, KSZ8873MLL AM Datasheet - Page 52

• 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.
Register 5 (0x05): Global Control 3
September 2009
Bit
2
1
0
Bit
7
6
5
4
3
2
1
0
Huge Packet
Support
Legal
Maximum
Packet Size
Check Enable
Reserved
802.1Q VLAN
Enable
IGMP Snoop
Enable on
Switch MII
Interface
Reserved
Reserved
Weighted
Fair Queue
Enable
Indicate that
the Current
Priority Queue
is depleted.
Reserved
Sniff Mode
Select
Name
Name
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
R/W
R/W
Description
=1, Will accept packet sizes up to 1916 bytes (inclusive). This bit
setting will override setting from bit 1 of this register.
=0, The max packet size will be determined by bit 1 of this register.
=0, Will accept packet sizes up to 1536 bytes (inclusive).
=1, 1522 bytes for tagged packets, 1518 bytes for untagged
packets. Any packets larger than the specified value will be
dropped.
Reserved
Do not change the default value.
Description
=1, 802.1Q VLAN mode is turned on. VLAN table needs to set up
before the operation.
=0, 802.1Q VLAN is disabled.
=1, IGMP snoop is enabled. All IGMP packets will be forwarded to
the Switch MII port.
=0, IGMP snoop is disabled.
Reserved
Do not change the default values.
Reserved
Do not change the default values.
=0, Always transmit higher priority packets first
=1, Weighted Fair Queueing enabled. When all four queues have
packets waiting to transmit, the bandwidth allocation is q3:q2:q1:q0
= 8:4:2:1.
If any queues are empty, the highest non-empty queue gets one
more weighting. For example, if q2 is empty, q3:q2:q1:q0 becomes
(8+1):0:2:1.
=1, Indicate the current priority queue is depleted in the specified
cpu_txq_rate before transfer packet from next lower priority queue.
=0, Rotate transmit between four queues.
Reserved
Do not change the default values.
=1, Will do RX AND TX sniff (both source port and destination port
need to match)
=0, Will do RX OR TX sniff (either source port or destination port
needs to match). This is the mode used to implement RX only sniff.
52
KSZ8873MLL/FLL/RLL
Default
0
0
0
Default
0
0
0
0
0
0
0
0
M9999-092309-1.2