Specifications

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Global Registers (Continued)
Address Name Description Mode Default
4
Switch SW5-MII/RMII
Speed
1, the switch SW5-MII/RMII is in 10Mbps mode.
0, the switch SW5-MII/RMII is in 100Mbps mode.
R/W
0
Pin SMRXD1
strap option.
PD(0): (default)
Enable 100Mbps.
PU(1): Enable
10Mbps.
Note: SMRXD1
has internal pull-
down.
3 Null VID Replacement
1, will replace null VID with port VID (12 bits).
0, no replacement for null VID.
R/W 0
2−0
Broadcast Storm
Protection Rate Bit[10:8]
This along with the next register determines how many
“64 byte blocks” of packet data allowed on an input port
in a preset period. The period is 50ms for 100BT or
500ms for 10BT. The default is 1%.
R/W 000
Register 7 (0x07): Global Control 5
7−0
Broadcast Storm
Protection Rate Bit[7:0]
This along with the previous register determines how
many “64-byte blocks” of packet data are allowed on an
input port in a preset period. The period is 50ms for
100BT or 500ms for 10BT. The default is 1%.
R/W 0x4A
(1)
Register 8 (0x08): Global Control 6
7−0
Factory Testing N/A Do not change. RO 0x00
Register 9 (0x09): Global Control 7
7−0
Factory Testing N/A Do not change. RO 0x4C
Note:
148,800 frames/sec × 50ms/interval × 1% = 74 frames/interval (approx.) = 0x4A.
March 12, 2014
61
Revision 1.7