Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 100)

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If the O=2’b00 indicates the CPU is the owner of Rx descriptor. After the CPU completes processing

the frame, it modifies the ownership field to 2’b10 and releases the Rx descriptor to EMC RxDMA.

Rx Status [29:16]: Receive Status

This field keeps the status for frame reception. All status bits are updated by EMC. In the receive

status, bits 29 to 23 are undefined and reserved for the future.

RP [22]: Runt Packet

The RP indicates the frame stored in the data buffer pointed by Rx descriptor is a short frame (frame

length is less than 64 bytes).

1’b0: The frame is not a short frame.

1’b1: The frame is a short frame.

ALIE [21]: Alignment Error

The ALIE indicates the frame stored in the data buffer pointed by Rx descriptor is not a multiple of

byte.

1’b0: The frame is a multiple of byte.

1’b1: The frame is not a multiple of byte.

RXGD [20]: Frame Reception Complete

The RXGD indicates the frame reception has completed and stored in the data buffer pointed by Rx

descriptor.

1’b0: The frame reception not complete yet.

1’b1: The frame reception completed.

PTLE [19]: Packet Too Long

The PTLE indicates the frame stored in the data buffer pointed by Rx descriptor is a long frame (frame

length is greater than 1518 bytes).

1’b0: The frame is not a long frame.

1’b1: The frame is a long frame.

CRCE [17]: CRC Error

The CRCE indicates the frame stored in the data buffer pointed by Rx descriptor incurred CRC error.

1’b0: The frame doesn’t incur CRC error.

1’b1: The frame incurred CRC error.

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 100

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 100

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