Sundance Spas ST201 manual Sundance Technology

Sundance Technology

BIT BIT NAME

9RcvFCS

10FIFOLoopback

11	MACLoopback
15..12	Reserved

16CollisionDetect

17CarrierSense

18TxInProg

19TxError

20Reserved

21StatisticsEnable

22StatisticsDisable

23StatisticsEnabled

24TxEnable

25TxDisable

26TxEnabled

27RxEnable

28RxDisable

29RxEnabled

ST201 PRELIMINARY draft 2

BIT DESCRIPTION

This bit is set by the host if it is desired for the receive frame’s FCS to be passed to the host as part of the data in the RxFIFO. The state of RcvFCS does not affect the ST201’s checking of the frame’s FCS and its posting of FCS error status. RcvFCS is cleared by a system reset. To avoid confusing the RxFIFO logic, the value of RcvFCS should only be changed when the receiver is disabled and the RxFIFO is empty.

Setting this bit forces data loopback from the TxFIFO directly into the RxFIFO. When using FIFO Loopback mode, it is the software’s respon- sibility to ensure that the proper interframe gap is inserted between frames, to avoid losing data in the receive path. To do this, the soft- ware must not load more than one transmit frame into the TxFIFO at a time. TxReset and RxReset bits in AsicCtrl must be set after changing the value of this bit.

Setting this bit will cause the ST201 to loop back transmissions at the output of the media access controller. TxReset and RxReset bits in AsicCtrl must be set after changing the value of this bit.

Reserved for future use. Should be set to 0.

This read-only bit provides a real-time indication of the state of the COL signal within ST201.

This read-only bit provides a real-time indication of the state of the CRS signal within ST201.

A real-time indication that a frame is being transmitted. This bit is used by drivers during under run recovery to delay issuing a TxReset.

If a TxUnderrun occurs, this bit is set, indicating that the transmitter needs to be reset with the TxReset.

Reserved for future use. Should be set to 0.

When set, ST201 will collect statistics with the various statistics counters and registers. This bit is self-clearing.

When set, ST201 will stop collection of statistics with the statistics reg- isters. The values in the statistics registers will remain unchanged. This bit is self-clearing.

This read-only status bit is set by ST201 to indicate that statistics col- lection is enabled.

When set, the transmitter logic is enabled. This bit is self-clearing.

When set, the transmitter logic is disabled. This bit is self-clearing.

This read-only status bit is set by ST201 to indicate that transmitter is enabled.

When set, the receiver logic is enabled. This bit is self-clearing.

When set, the receiver logic is disabled. This bit is self-clearing.

This read-only status bit is set by ST201 to indicate that receiver is enabled.

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