KSZ8895MQ_12 MICREL [Micrel Semiconductor], KSZ8895MQ_12 Datasheet - Page 59

• Manufacturer Part Number: KSZ8895MQ_12
• Description: Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface
• Manufacturer: MICREL [Micrel Semiconductor]

Micrel, Inc.
Global Registers (Continued)
March 2012
Address
4
3-2
1
0
Register 6 (0x07): Global Control 4
7
6
5
Name
Enable Pre-Tag on
Switch SW5-
MII/TMI/RMIII Interface
Reserved
Enable “Tag” Mask
Sniff Mode Select
Switch SW5-MII/RMII
Back Pressure Enable
Switch SW5-MII/RMII
Half-Duplex Mode
Switch SW5-MII/RMII
Flow Control Enable
Description
1, packets forwarded to Switch MII/RMII interface will
be pre-tagged with the source port number (preamble
before MRXDV).
0, normal operation.
N/A
1, the last 5 digits in the VID field are used as a mask to
determine which port(s) the packet should be forwarded
to.
0, no tag masks.
Note: you need to turn off the 802.1q VLAN mode
(reg0x5, bit 7 = 0) for this bit to work
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.
1, enable half-duplex back pressure on switch MII/RMII
interface.
0, disable back pressure on switch MII interface.
1, enable MII/RMII interface half-duplex mode.
0, enable MII/RMII interface full-duplex mode.
1, enable full-duplex flow control on switch MII/RMII
interface.
0, disable full-duplex flow control on switch MII/RMII
interface.
59
Mode
R/W
R/W
R/W
R/W
R/W
R/W
RO
KSZ8895MQ/RQ/FMQ
Pin SMRXD2
strap option.
PD(0): (default)
Full-duplex
mode.
PU(1): Half-
duplex mode.
Note: SMRXD2
has internal pull-
down.
Pin SMRXD3
strap option.
PD(0): (default)
Disable flow
control.
PU(1): enable
flow control.
Note: SMRXD3
has internal pull-
down.
M9999-032612-1.5
Default
00
0
0
0
0
0
0