Freescale Semiconductor MPC5200B ユーザーズマニュアル

14-42

Freescale Semiconductor

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

91:ff:ff:ff:ff:ff

0x23

35

11:ff:ff:ff:ff:ff

0x24

36

31:ff:ff:ff:ff:ff

0x25

37

71:ff:ff:ff:ff:ff

0x26

38

51:ff:ff:ff:ff:ff

0x27

39

7f:ff:ff:ff:ff:ff

0x28

40

4f:ff:ff:ff:ff:ff

0x29

41

1f:ff:ff:ff:ff:ff

0x2a

42

3f:ff:ff:ff:ff:ff

0x2b

43

bf:ff:ff:ff:ff:ff

0x2c

44

9f:ff:ff:ff:ff:ff

0x2d

45

df:ff:ff:ff:ff:ff

0x2e

46

ef:ff:ff:ff:ff:ff

0x2f

47

93:ff:ff:ff:ff:ff

0x30

48

b3:ff:ff:ff:ff:ff

0x31

49

f3:ff:ff:ff:ff:ff

0x32

50

d3:ff:ff:ff:ff:ff

0x33

51

53:ff:ff:ff:ff:ff

0x34

52

73:ff:ff:ff:ff:ff

0x35

53

23:ff:ff:ff:ff:ff

0x36

54

13:ff:ff:ff:ff:ff

0x37

55

3d:ff:ff:ff:ff:ff

0x38

56

0d:ff:ff:ff:ff:ff

0x39

57

5d:ff:ff:ff:ff:ff

0x3a

58

7d:ff:ff:ff:ff:ff

0x3b

59

fd:ff:ff:ff:ff:ff

0x3c

60

dd:ff:ff:ff:ff:ff

0x3d

61

9d:ff:ff:ff:ff:ff

0x3e

62

bd:ff:ff:ff:ff:ff

0x3f

63