21
nBP register (register 21)
The nBP register defines back-pressure flow control
capability for each port. Table-7.21 describes all the
bit of this register.
nPORT register (register 22)
The nPORT register is used to isolate ports from the
network. Setting the associated bit in this register will
stop a port from receiving or transmitting any frame.
Table-7.22 describes all the bits of this register.
Table-7.21: nBP Register
Bit
Default
0 - Port 0 back-pressure scheme enabled
1 - Port 0 back-pressure scheme disabled
0 - Port 1 back-pressure scheme enabled
1 - Port 1 back-pressure scheme disabled
0 - Port 2 back-pressure scheme enabled
1 - Port 2 back-pressure scheme disabled
0 - Port 3 back-pressure scheme enabled
1 - Port 3 back-pressure scheme disabled
0 - Port 4 back-pressure scheme enabled
1 - Port 4 back-pressure scheme disabled
0 - Port 5 back-pressure scheme enabled
1 - Port 5 back-pressure scheme disabled
0 - Port 6 back-pressure scheme enabled
1 - Port 6 back-pressure scheme disabled
0 - Port 7 back-pressure scheme enabled
1 - Port 7 back-pressure scheme disabled
0 - Port 8 back-pressure scheme enabled
1 - Port 8 back-pressure scheme disabled
0 - Port 9 back-pressure scheme enabled
1 - Port 9 back-pressure scheme disabled
0 - Port 10 back-pressure scheme enabled
1 - Port 10 back-pressure scheme disabled
0 - Port 11 back-pressure scheme enabled
1 - Port 11 back-pressure scheme disabled
0 - Port 12 back-pressure scheme enabled
1 - Port 12 back-pressure scheme disabled
0 - Port 13 back-pressure scheme enabled
1 - Port 13 back-pressure scheme disabled
0 - Port 14 back-pressure scheme enabled
1 - Port 14 back-pressure scheme disabled
0 - Port 15 back-pressure scheme enabled
1 - Port 15 back-pressure scheme disabled
0 - Port 16 back-pressure scheme enabled
1 - Port 16 back-pressure scheme disabled
0 - Port 17 back-pressure scheme enabled
1 - Port 17 back-pressure scheme disabled
0 - Port 18 back-pressure scheme enabled
1 - Port 18 back-pressure scheme disabled
0 - Port 19 back-pressure scheme enabled
1 - Port 19 back-pressure scheme disabled
0 - Port 20 back-pressure scheme enabled
1 - Port 20 back-pressure scheme disabled
0 - Port 21 back-pressure scheme enabled
1 - Port 21 back-pressure scheme disabled
0 - Port 22 back-pressure scheme enabled
1 - Port 22 back-pressure scheme disabled
0 - Port 23 back-pressure scheme enabled
1 - Port 23 back-pressure scheme disabled
0
1
2
Description
3
4
5
6
7
8
9
10
11
12
13
14
0
23
19
20
21
22
15
16
17
18
Table-7.22: nPort Register
Bit
Default
0 - Port 0 enabled
1 - Port 0 disabled
0 - Port 1 enabled
1 - Port 1 disabled
0 - Port 2 enabled
1 - Port 2 disabled
0 - Port 3 enabled
1 - Port 3 disabled
0 - Port 4 enabled
1 - Port 4 disabled
0 - Port 5 enabled
1 - Port 5 disabled
0 - Port 6 enabled
1 - Port 6 disabled
0 - Port 7 enabled
1 - Port 7 disabled
0 - Port 8 enabled
1 - Port 8 disabled
0 - Port 9 enabled
1 - Port 9 disabled
0 - Port 10 enabled
1 - Port 10 disabled
0 - Port 11 enabled
1 - Port 11 disabled
0 - Port 12 enabled
1 - Port 12 disabled
0 - Port 13 enabled
1 - Port 13 disabled
0 - Port 14 enabled
1 - Port 14 disabled
0 - Port 15 enabled
1 - Port 15 disabled
0 - Port 16 enabled
1 - Port 16 disabled
0 - Port 17 enabled
1 - Port 17 disabled
0 - Port 18 enabled
1 - Port 18 disabled
0 - Port 19 enabled
1 - Port 19 disabled
0 - Port 20 enabled
1 - Port 20 disabled
0 - Port 21 enabled
1 - Port 21 disabled
0 - Port 22 enabled
1 - Port 22 disabled
0 - Port 23 enabled
1 - Port 23 disabled
0
23
19
20
21
22
15
16
17
18
11
12
13
14
7
8
9
10
3
4
5
6
0
1
2
Description
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