KS8893MQL Micrel Inc, KS8893MQL Datasheet - Page 65

• Manufacturer Part Number: KS8893MQL
• Description: IC MANAGED SWITCH 10/100 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8893MQL

• Applications: *
• 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
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.5V
• Operating Supply Voltage (min): 3.1V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1457

Register 5 (0x05): Global Control 3 (continued)
Register 6 (0x06): Global Control 4
Bit
3
2-1
0
Bit
7
6
5
December 2007
Name
Weighted
Fair Queue
Enable
Reserved
Sniff Mode
Select
Name
Repeater
Mode
Switch MII Half
Duplex Mode
Switch MII
Flow Control
Enable
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
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.
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.
Description
=1, enable repeater mode
=0, disable repeater mode
Note: For repeater mode, all ports need to be set to
100BASE-TX and half duplex mode. PHY ports need
to have auto-negotiation disabled.
= 1, enable MII interface half-duplex mode.
= 0, enable MII interface full-duplex mode.
= 1, enable full duplex flow control on Switch MII
interface.
= 0, disable full duplex flow control on Switch MII
interface.
65
Default
0
00
0
Default
0
Pin SMRXD2
strap option.
Pull-down(0):
Full-duplex
mode
Pull-up(1):
Half-duplex
mode
Note:
SMRXD2 has
internal pull-
down.
Pin SMRXD3
strap option.
Pull-down(0):
Disable flow
control
Pull- up(1):
Enable flow
control
Note:
SMRXD3 has
internal pull-
down.
M9999-121007-1.5