Datasheet
KSZ8895MQX/RQX/FQX/MLX
DS00002246A-page 64 2016 Microchip Technology Inc.
5 - 4 Tag_0x6
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE
802.1p tag has a value of 0x6.
R/W 0x3
3 - 2 Tag_0x5
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE
802.1p tag has a value of 0x5.
R/W 0x2
1 - 0 Tag_0x4
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE
802.1p tag has a value of 0x4.
R/W 0x2
Register 130 (0x82): Global Control 14
7 - 6
Pri_2Q[1:0]
(Note that
program
Prio_2Q[1:0] =
01 is not
supported and
should be
avoided)
When the 2 Queue configuration is selected,
these Pri_2Q[1:0] bits are used to map the 2-bit
result of IEEE 802.1p from Register 128/129 or
TOS/DiffServ from Register 144-159 mapping
(for 4 Queues) into two queues low/high priori-
ties.
2-bit result of IEEE 802.1p or TOS/DiffServ
00 (0) = map to Low priority queue
01 (1) = Prio_2Q[0] map to Low/High priority
queue
10 (2) = Prio_2Q[1] map to Low/High priority
queue
11 (3) = map to High priority queue
Pri_2Q[1:0] =
00: Result 0, 1, 2 are low priority. 3 is high prior-
ity.
10: Result 0, 1 are low priority. 2, 3 are high pri-
ority (default).
11: Result 0 is low priority. 1, 2, 3 are high prior-
ity.
R/W 10
5 Reserved N/A Do not change. RO 0
4 Reserved N/A Do not change. RO 0
3 - 2 Reserved N/A Do not change. RO 01
1 Reserved N/A Do not change. RO 0
0 Reserved N/A Do not change. RO 0
Register 131 (0x83): Global Control 15
7 Reserved N/A Do not change. RO 1
6 Reserved N/A Do not change. RO 0
5
Unknown
unicast packet
forward
1 = enable supporting unknown unicast packet
forward
0 = disable
R/W 0
4 - 0
Unknown
unicast packet
forward port
map
00000 = filter unknown unicast packet
00001 = forward unknown unicast packet to port
1,
00010 = forward unknown unicast packet to port
2,
00011 = forward unknown unicast packet to port
1, port 2
…
11111 = broadcast unknown unicast packet to all
ports
R/W 00000
TABLE 4-4: ADVANCED CONTROL REGISTER DESCRIPTIONS (CONTINUED)
Address Name Description Mode Default