KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 82

• 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
Notes:
Data Rate Selection Table in 100BT
Address
Register 190 (0xBE):
Register 206 (0xCE): Port 1 Queue 3 Egress Limit Control 4
Register 222 (0xDE): Port 2 Queue 3 Egress Limit Control 4
Register 238 (0xEE): Port 3 Queue 3 Egress Limit Control 4
Register 254 (0xFE): Port 4 Queue 3 Egress Limit Control 4 and Chip ID
7
6 - 0
Rate for 100BT mode
1 Mbps <= rate <= 99 Mbps
rate = 100 Mbps
Less than 1Mbps see as below
64 Kbps
128 Kbps
192 Kbps
256 Kbps
320 Kbps
384 Kbps
448 Kbps
512 Kbps
576 Kbps
640 Kbps
704 Kbps
768 Kbps
832 Kbps
896 Kbps
960 Kbps
1.
2.
In the port priority 0-3 ingress rate limit mode, there is a need to set all related ingress/egress ports to two queues or four queues mode.
In the port queue 0-3 egress rate limit mode, the highest priority get exact rate limit based on the rate select table, other priorities
packets rate are based up on the ratio of the port register control 10/11/12/13 when use more than one egress queue per port.
Name
Reserved and Chip ID
Port Queue 3 Egress Limit
Reserved
Table 11. 100BT Rate Selection for the Rate limit
Priority/Queue 0-3 Ingress/egress limit Control Register bit[6:0]= decimal
rate(decimal integer 1-99)
0 or 100 (decimal), ‘0’ is default value
Decimal
7’d101
7’d102
7’d103
7’d104
7’d105
7’d106
7’d107
7’d108
7’d109
7’d110
7’d111
7’d112
7’d113
7’d114
7’d115
Description
=0 is for the register 206/222/238
=1 is KSZ8864RMN Chip ID for the register 254
Egress data rate limit for priority 3 frames
Egress traffic from this priority queue is shaped
according to the Data Rate Selected Table. See the
table follow the end of Egress limit control registers.
In four queues mode, it is highest priority.
82
Mode
R/W
RO
M9999-092011-1.4
0000000
Default
0 or 1