KSZ8895MQ_12 Datasheet, PDF (76/116 Pages) Micrel Semiconductor – Integrated 5-Port 10/100 Managed Ethernet Switch with MII/RMII interface

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Advanced Control Registers (Continued)
Address Name
Description
0
Reserved
N/A Do not change.
Register 131 (0x83): Global Control 15
7
Reserved
N/A
6
Reserved
5
Unknown unicast packet
forward
4–0
Unknown unicast packet
forward port map
N/A
1 = enable supporting unknown unicast packet
forward
0 = disable
00000 = filter uknown unicast packet
00001 = forward uknown unicast packet to port 1
00011 = forward uknown unicast packet to port 1,
port 2
…
11111 = broadcast uknown unicast packet to all
ports
Register 132 (0x84): Global Control 16
7–6
5
4–0
Chip I/O output drive strength
select[1:0]
Unknown multicast packet
forward (not including IP
multicast packet)
Unknown multicast packet
forward port map
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
1 = enable supporting unknown multicast packet
forward
0 = disable
00000 = filter uknown multiicast packet
00001 = forward uknown multicast packet to port 1
00011 = forward uknown multicast packet to port 1,
port 2
…
11111 = broadcast uknown multicast packet to all
ports
Register 133(0x85): Global Control 17
7–6
5
4–0
Reserved
Unknown VID packet forward
Unknown VID packet forward
port map
1 = enable supporting unknown VID packet forward
0 = disable
00000 = filter uknown VID packet
00001 = forward uknown VID packet to port 1
00011 = forward uknown VID packet to port 1, port
2
…
11111 = broadcast uknown VID packet to all ports
Mode
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
RO
R/W
R/W
Default
0.
0
0
0
00000
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.
0
00000
00
0
00000
March 2012
76
M9999-032612-1.5