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Initialization Sequence
14.9.7
Full-Duplex Flow Control
Full-duplex flow control allows the user to transmit pause frames and to detect received pause frames. Upon detection of a pause frame, MAC
data frame transmission stops for a given pause duration.
To enable pause frame detection, the FEC must operate in full-duplex mode (X_CNTRL.FDEN asserted) and flow control enable
(R_CNTRL.FCE) must be asserted. The FEC detects a pause frame when the fields of the incoming frame match the pause frame
specifications as shown in the table below. In addition, the receive status associated with the frame should indicate that the frame is valid
14-42
Table 14-45. Destination Address to 6-Bit Hash (continued)
48-bit DA
6-bit hash (in hex)
91:ff:ff:ff:ff:ff
11:ff:ff:ff:ff:ff
31:ff:ff:ff:ff:ff
71:ff:ff:ff:ff:ff
51:ff:ff:ff:ff:ff
7f:ff:ff:ff:ff:ff
4f:ff:ff:ff:ff:ff
1f:ff:ff:ff:ff:ff
3f:ff:ff:ff:ff:ff
bf:ff:ff:ff:ff:ff
9f:ff:ff:ff:ff:ff
df:ff:ff:ff:ff:ff
ef:ff:ff:ff:ff:ff
93:ff:ff:ff:ff:ff
b3:ff:ff:ff:ff:ff
f3:ff:ff:ff:ff:ff
d3:ff:ff:ff:ff:ff
53:ff:ff:ff:ff:ff
73:ff:ff:ff:ff:ff
23:ff:ff:ff:ff:ff
13:ff:ff:ff:ff:ff
3d:ff:ff:ff:ff:ff
0d:ff:ff:ff:ff:ff
5d:ff:ff:ff:ff:ff
7d:ff:ff:ff:ff:ff
fd:ff:ff:ff:ff:ff
dd:ff:ff:ff:ff:ff
9d:ff:ff:ff:ff:ff
bd:ff:ff:ff:ff:ff
MPC5200B Users Guide, Rev. 1
hash decimal value
0x23
35
0x24
36
0x25
37
0x26
38
0x27
39
0x28
40
0x29
41
0x2a
42
0x2b
43
0x2c
44
0x2d
45
0x2e
46
0x2f
47
0x30
48
0x31
49
0x32
50
0x33
51
0x34
52
0x35
53
0x36
54
0x37
55
0x38
56
0x39
57
0x3a
58
0x3b
59
0x3c
60
0x3d
61
0x3e
62
0x3f
63
Freescale Semiconductor
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