VT6516 ETC, VT6516 Datasheet - Page 47

• Manufacturer Part Number: VT6516
• Description: 16/12 PORT 10/1000 ASE T/TX
• Manufacturer: ETC

04H
10-
13H
14-
17H
18-
1BH
1C-
1FH
20-
23H
24-
27H
28-
2BH
2C-
2FH
30-
33H
34-
37H
38-
3BH
3C-
3FH
40-
43H
44-
47H
48-
4BH
CPU Port Speed Configuration
3’b000: 1 Mbit (default)
3’b001: 5 Mbit
3’b010: 10 Mbit
3’b011: 20 Mbit
3’b100: 40 Mbit
3’b101: 50 Mbit
3’b110: 80 Mbit
3’b111: 100 Mbit
This register is used to calculate the congestion factor of the CPU
port, that is the quotient of the accumulated byte count of the CPU
output queue to the specified CPU port speed. While the congestion
control is triggered, the output ports with congestion factor larger
than the average will enter into the congestion control mode.
Congestion Factor of Output Port 0
The congestion factor, i.e. the quotient of the accumulated byte
count of the output queue to the port speed, for each of 16 Ethernet
ports is calculated by the flow control module. While the congestion
control is triggered, the output ports with congestion factor larger
than the average will enter into the congestion control mode.
Congestion Factor of Output Port 1
Congestion Factor of Output Port 2
Congestion Factor of Output Port 3
Congestion Factor of Output Port 4
Congestion Factor of Output Port 5
Congestion Factor of Output Port 6
Congestion Factor of Output Port 7
Congestion Factor of Output Port 8
Congestion Factor of Output Port 9
Congestion Factor of Output Port 10
Congestion Factor of Output Port 11
Congestion Factor of Output Port 12
Congestion Factor of Output Port 13
Congestion Factor of Output Port 14
VIA Technologies, Inc.
-47-
Preliminary VT6516 Datarsheet
CPU_SPD_CF
G
CONGEST_F
CT0
CONGEST_F
CT1
CONGEST_F
CT2
CONGEST_F
CT3
CONGEST_F
CT4
CONGEST_F
CT5
CONGEST_F
CT6
CONGEST_F
CT7
CONGEST_F
CT8
CONGEST_F
CT9
CONGEST_F
CT10
CONGEST_F
CT11
CONGEST_F
CT12
CONGEST_F
CT13
CONGEST_F
CT14
[2:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
[25:0]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O
R/O