Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 101)

100

101

W90P710CD/W90P710CDG

Publication Release Date: September 19, 2006

- 101 - Revision B2

RXINTR [16]: Receive Interrupt

The RXINTR indicates the frame stored in the data buffer pointed by Rx descriptor caused an interrupt

condition.

1’b0: The frame doesn’t cause an interrupt.

1’b1: The frame caused an interrupt.

RBC [15:0]: Receive Byte Count

The RBC indicates the byte count of the frame stored in the data buffer pointed by Rx descriptor. The

four bytes CRC field is also included in the receive byte count. But if the SPCRC of register MCMDR

is enabled, the four bytes CRC field will be excluded from the receive byte count.

Rx Descriptor Word 1

31 30 29 28 27 26 25 24

RXBSA

23 22 21 20 19 18 17 16

RXBSA

15 14 13 12 11 10 9 8

RXBSA

7 6 5 4 3 2 1 0

RXBSA BO

RXBSA [31:2]: Receive Buffer Starting Address

The RXBSA indicates the starting address of the receive frame buffer. The RXBSA is used to be the

bit 31 to 2 of memory address. In other words, the starting address of the receive frame buffer always

located at word boundary.

BO [1:0]: Byte Offset

The BO indicates the byte offset from RXBSA where the received frame begins to store. If the BO is

2’b01, the starting address where the received frame begins to store is RXBSA+2’b01, and so on.

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 551 552

Rainbow-electronics W90P710CDG Manual de usuario Pagina 101

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 101

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