KSZ8893FQL-FX Micrel Inc, KSZ8893FQL-FX Datasheet - Page 62

• 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.
Register 4 (0x04): Global Control 2
October 2007
Bit
7
6
5
4
3
2
1
0
Name
Unicast
Port-VLAN Mismatch
Discard
Multicast Storm
Protection Disable
Back Pressure
Mode
Flow Control and Back
Pressure Fair Mode
No Excessive Collision
Drop
Huge Packet Support
Legal Maximum
Packet Size Check
Enable
Priority Buffer Reserve
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
This feature is used with port-VLAN (described in reg. 17, reg.
33, …)
1 = All packets can not cross VLAN boundary
0 = Unicast packets (excluding unkown/multicast/ broadcast)
can cross VLAN boundary
Note: Port mirroring is not supported if this bit is set to “0”.
1 = “Broadcast Storm Protection” does not include multicast
packets. Only DA = FF-FF-FF-FF-FF-FF packets will be
regulated.
0 = “Broadcast Storm Protection” includes:
DA = FF-FF-FF-FF-FF-FF and DA[40] = 1 packets.
1 = Carrier sense based backpressure is selected
0 = Collision based backpressure is selected
1 = Fair mode is selected. In this mode, if a flow control port and
a non-flow control port talk to the same destination port, packets
from the non-flow control port may be dropped. This is to
prevent the flow control port from being flow controlled for an
extended period of time.
0 = In this mode, if a flow control port and a non-flow control port
talk to the same destination port, the flow control port will be
flow controlled. This may not be “fair” to the flow control port.
1 = The switch will not drop packets when 16 or more collisions
occur.
0 = The switch will drop packets when 16 or more collisions
occur.
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.
1 = Each port is pre-allocated 48 buffers for high priority (q3, q2,
and q1) packets. This selection is effective only when the
multiple queue feature is turned on. It is recommended to
enable this bit for multiple queue.
0 = No reserved buffers for high priority packets. Each port is
pre-allocated 48 buffers for all priority packets (q3, q2,q1, and
q0).
Description
62
M9999-101607-1.3
SMRXD0 (pin
85) value
during reset
KSZ8893FQL
Default
1
1
1
1
0
0
1