Datasheet
KSZ8895MQX/RQX/FQX/MLX
DS00002246A-page 66 2016 Microchip Technology Inc.
4 - 0
Unknown IP
multicast packet
forward port
map
00000 = filter unknown IP multicast packet
00001 = forward unknown IP multicast packet to
port 1,
00010 = forward unknown IP multicast packet to
port 2,
00011 = forward unknown IP multicast packet to
port 1, port 2
…
11111 = broadcast unknown IP multicast packet
to all ports
R/W 00000
Register 135 (0x87): Global Control 19
7 Reserved N/A Do not change. RO 0
6 Reserved N/A Do not change. RO 0
5 - 4
Ingress Rate
Limit Period
The unit period for calculating Ingress Rate
Limit
00 = 16 ms
01 = 64 ms
1x = 256 ms
R/W 01
3
Queue-based
Egress Rate
Limit Enabled
Enable Queue-based Egress Rate Limit
0 = Port-based Egress Rate Limit (default)
1 = Queue-based Egress Rate Limit
R/W 0
2
Insertion Source
Port PVID Tag
Selection
Enable
1 = enable source port PVID tag insertion or
non-insertion option on the egress port for each
source port PVID based on the ports Registers
control 8.
0 = disable, all packets from any ingress port will
be inserted PVID based on Register Port Con-
trol 0 bit 2.
R/W 0
1 - 0 Reserved N/A Do not change. RO 00
Register 137 (0x89): Identification Register
7 - 4 Revision ID
These bits are for the device identification
0000-0011: Reserved
0100 (0x4): For MQX/RQX/FQX Rev.A2 and ML
Rev.B2
0101 (0x5): For MQX/RQX/FQX Rev.A3 and ML
(SPNZ801061 and SPNZ801156) Rev.B3
0110 (0x6): For MQX/RQX/FQX/MLX Rev.A4
0111-1111: Reserved
RO
Dependent on
Revision Number
3 - 0 Reserved N/A Do not change. RO 00
Register 144 (0x90): TOS Priority Control Register 0
The IPv4/IPv6 TOS priority control registers implement a fully decoded 64 bit differentiated services code point
(DSCP) register used to determine priority from the 6 bit TOS field in the IP header. The most significant 6 bits of the
TOS field are fully decoded into 64 possibilities, and the singular code that results is mapped to the value in the cor-
responding bit in the DSCP register.
7 - 6 DSCP[7:6]
IPv4 and IPv6 mapping
The value in this field is used as the frame’s pri-
ority when bits [7:2] of the frame’s IP TOS/Diff-
Serv/Traffic Class value are 0x03.
R/W 00
5 - 4 DSCP[5:4]
IPv4 and IPv6 mapping
The value in this field is used as the frame’s pri-
ority when bits [7:2] of the frame’s IP TOS/Diff-
Serv/Traffic Class value is 0x02
R/W 00
TABLE 4-4: ADVANCED CONTROL REGISTER DESCRIPTIONS (CONTINUED)
Address Name Description Mode Default