Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 107)

100

101

W90P710CD/W90P710CDG

Publication Release Date: September 19, 2006

- 107 - Revision B2

TXINTR [16]: Transmit Interrupt

The TXINTR indicates the packet transmission caused an interrupt condition.

1’b0: The packet transmission doesn’t cause an interrupt.

1’b1: The packet transmission caused an interrupt.

TBC [15:0]: Transmit Byte Count

The TBC indicates the byte count of the frame stored in the data buffer pointed by Tx descriptor for

transmission.

Tx Descriptor Word 3

31 30 29 28 27 26 25 24

NTXDSA

23 22 21 20 19 18 17 16

NTXDSA

15 14 13 12 11 10 9 8

NTXDSA

7 6 5 4 3 2 1 0

NTXDSA

NTXDSA [31:0]: Next Tx Descriptor Starting Address

The Tx descriptor is a link-list data structure. Consequently, NTXDSA is used to keep the starting

address of the next Tx descriptor. The bits [1:0] will be ignored by EMC. So, all Tx descriptor must

locate at word boundary memory address.

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 551 552

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 107

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