KSZ8893-MQL Micrel Semiconductor, Inc., KSZ8893-MQL Datasheet - Page 58

• Manufacturer Part Number: KSZ8893-MQL
• Description: Integrated 3-Port 10/100 Managed Switch with PHYs
• Manufacturer: Micrel Semiconductor, Inc.

Register 5 (0x05): Global Control 3 (continued)
Bit
3
2-1
0
Register 6 (0x06): Global Control 4
Bit
7
6
5
Micrel
November 2005
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.
58
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.
KSZ8893MQL/MQLI
M9999-111705