Specifications

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Advanced Control Registers (Continued)
Address Name Description Mode Default
Register 132 (0x84): Global Control 16
7–6
Chip I/O output drive strength
select[1:0]
Output drive strength select[1:0] =
00 = 4mA drive strength
01 = 8mA drive strength (default)
10 = 12mA drive strength
11 = 16 mA drive strength
Note:
bit[1] value is the INVERT of the strap value at the
pin.
Bit[0] value is the SAME of the strap value at the
pin
R/W
01
Pin LED[3][0]
strap option.
Pull-down (0):
Select 12mA
drive strength.
Pull-up (1):
Select 8mA
drive strength.
Note: LED[3][0]
has internal
pull-up.
5
Unknown multicast packet
forward (not including IP
multicast packet)
1 = enable supporting unknown multicast packet
forward
0 = disable
R/W 0
4–0
Unknown multicast packet
forward port map
00000 = filter unknown multiicast packet
00001 = forward unknown multicast packet to port
1.
00010 = forward unknown multicast packet to port
2.
00011 = forward unknown multicast packet to port
1, port 2
……
11111 = broadcast unknown multicast packet to all
ports
R/W 00000
Register 133(0x85): Global Control 17
7–6 Reserved RO 00
5 Unknown VID packet forward
1 = enable supporting unknown VID packet forward
0 = disable
R/W 0
4–0
Unknown VID packet forward
port map
00000 = filter uknown VID packet
00001 = forward unknown VID packet to port 1.
00010 = forward unknown VID packet to port 2.
00011 = forward unknown VID packet to port 1, port
2
……
11111 = broadcast unknown VID packet to all ports
R/W 00000
Register 134 (0x86): Global Control 18
7 Reserved N/A RO 0
6 Self Address Filter Enable
1 = Enable filtering of self-address unicast and
multicast packet
0 = Do not filter self-address packet
Note: The self-address filtering will filter packets on
the egress port , self MAC address is assigned in
the register 104-109.
R/W 0
5
Unknown IP multicast packet
forward
1 = enable supporting unknown IP multicast packet
forward
0 = disable
R/W 0
March 12, 2014
78
Revision 1.7