MVTX2801
Data Sheet
- 1 - Flow Control Off (Default 1'b0)
- 0 - Flow Control On
When flow control is on:
Bit [0]
•
•
In full duplex mode, the MAC transmitter sends Flow Control Frames when necessary. The
MAC receiver interprets and processes incoming flow control frames. The Flow Control Frame
Received counter is incremented whenever a flow control frame is received.
•
•
When flow control is off:
In full duplex mode, the MAC transmitter does not send flow control frames. The MAC receiver
does not interpret or process the flow control frames. The Flow Control Frame Receiver
counter is not incremented.
Bit [5]
•
•
Asymmetric Flow Control Enable.
- 0 - Disable asymmetric flow control
- 1 - Enable asymmetric flow control
When this bit is set, and flow control is on (bit[0] = 0), don't send out a flow control frame. But
MAC Receiver interprets and process flow control frames. (Default is 0)
- SS - Spanning tree state (802.1D spanning tree protocol). (Default 2'b11)
- 00 - Blocking: Frame is dropped
Bit [7:6]
- 01 - Listening: Frame is dropped
- 10 - Learning: Frame is dropped. Source MAC address is learned.
- 11 - Forwarding: Frame is forwarded. Source MAC address is learned.
10.2.2 ECR2Pn: Port N Control Register
2
I C Address: 01+2n; Serial Interface Address:h001+2n (n=0to3)
Accessed by serial interface (R/W)
7
6
5
3
2
1
0
Security En
DisL
Ftf
Futf
Bit[0]:
Bit[1]:
•
•
•
Filter untagged frame (Default 0)
0: Disable
1: Enable - All untagged frames from this port are discarded or follow security option when
security is enable
•
•
•
Filter Tag frame (Default 0)
0: Disable
1: Enable - All tagged frames from this port are discarded or follow security option when
security is enable
Bit[2]:
•
•
•
Learning Disable (Default 0)
0: Learning is enabled on this port
1: Learning is disabled on this port
Bit [5:3]
•
Reserved
32
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