Rainbow-electronics W90P710CDG Bedienungsanleitung PDF herunterladen (Seite 105)

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W90P710CD/W90P710CDG

Publication Release Date: September 19, 2006

- 105 - Revision B2

Tx Descriptor Word 2

31 30 29 28 27 26 25 24

CCNT

Reserved

SQE PAU TXHA

23 22 21 20 19 18 17 16

LC TXABT NCS EXDEF TXCP

Reserved

DEF TXINTR

15 14 13 12 11 10 9 8

TBC

7 6 5 4 3 2 1 0

TBC

CCNT [31:28]: Collision Count

The CCNT indicates the how many collision occurred consecutively during a packet transmission. If

the packet incurred 16 consecutive collisions during transmission, the CCNT will be 4’h0 and bit

TXABT will be set to 1.

SQE [26]: SQE Error

The SQE indicates the SQE error found at end of packet transmission on 10Mbps half-duplex mode.

The SQE error check will only be done while both bit EnSQE of MCMDR is enabled and EMC is

operating on 10Mbps half-duplex mode.

1’b0: No SQE error found at end of packet transmission.

1’b0: SQE error found at end of packet transmission.

PAU [25]: Transmission Paused

THE PAU INDICATES THE NEXT NORMAL PACKET transmission process will be paused temporally

because EMC received a PAUSE control frame, or S/W set bit SDPZ of MCMDR and make EMC to

transmit a PAUSE control frame out.

1’b0: Next normal packet transmission process will go on.

1’b1: Next normal packet transmission process will be paused.

TXHA [24]: Transmission Halted

The TXHA indicates the next normal packet transmission process will be halted because the bit TXON

of MCMDR is disabled be S/W.

1’b0: Next normal packet transmission process will go on.

1’b1: Next normal packet transmission process will be halted.

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