KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 71

• Manufacturer Part Number: KSZ8864RMNI
• Description: Integrated 4-Port 10/100 Managed Switch with Two MACs MII or RMII Interfaces
• Manufacturer: MICREL [Micrel Semiconductor]

September 2011
The registers 128, 129 can be used to map from 802.1p priority field 0-7 to switch’s four priority queues 0-3, 0x3 is highest priority
queues as priority 3, 0x0 is lowest priority queues as priority 0.
Address
Register 128 (0x80): Global Control 12
7 - 6
5 - 4
3 - 2
1 - 0
Register 129 (0x81): Global Control 13
7 - 6
5 - 4
3 - 2
1 - 0
Register 130 (0x82): Global Control 14
7 - 6
5
Tag_0x3
Tag_0x2
Tag_0x1
Tag_0x0
Tag_0x7
Tag_0x6
Tag_0x5
Tag_0x4
Pri_2Q[1:0]
(Note that program
Prio_2Q[1:0] = 01 is not
supported and should be
avoided)
Reserved
Name
Description
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 0x3.
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 0x2.
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 0x1.
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 0x0.
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 0x7.
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.
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.
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.
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 priorities.
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 priority.
10: Result 0,1 are low priority. 2,3 are high priority
(default).
11: Result 0 is low priority. 1,2,3 are high priority.
N/A Do not change.
71
Mode
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
M9999-092011-1.4
Default
0x1
0x1
0x0
0x0
0x3
0x3
0x2
0x2
10
0