Rainbow Electronics W90N745CDG User Manual

Page 124

W90N745CD/W90N745CDG

Publication Release Date: September 22, 2006

119

Revision

Continued.

BITS

DESCRIPTIONS

[8] TXON

The Frame Transmission ON controls the normal packet transmission
of EMC. If the TXON is set to high, the EMC starts the packet
transmission process, including the Tx descriptor fetching, packet
transmission and Tx descriptor modification.
It is must to finish EMC initial sequence before enable TXON.
Otherwise, the EMC operation is undefined.
If the TXON is disabled during EMC is transmitting a packet out, the
EMC stops the packet transmission process after the current packet
transmission finished.
1’b0: The EMC stops packet transmission process.
1’b1: The EMC starts packet transmission process.

[7:6] Reserved

[5] SPCRC

The Strip CRC Checksum controls if the length of incoming packet is
calculated with 4 bytes CRC checksum. If the SPCRC is set to high, 4
bytes CRC checksum is excluded from length calculation of incoming
packet.
1’b0: The 4 bytes CRC checksum is included in packet length
calculation.
1’b1: The 4 bytes CRC checksum is excluded in packet length
calculation.

[4] AEP

The Accept CRC Error Packet controls the EMC accepts or drops the
CRC error packet. If the AEP is set to high, the incoming packet with
CRC error will be received by EMC as a good packet.
1’b0: The CRC error packet will be dropped by EMC.
1’b1: The CRC error packet will be accepted by EMC.

[3] ACP

The Accept Control Packet controls the control frame reception. If the
ACP is set to high, the EMC will accept the control frame. Otherwise,
the control frame will be dropped.
It is recommended that S/W only enable AEP while EMC is operating
on full duplex mode.
1’b0: The control frame will be dropped by EMC.
1’b1: The control frame will be accepted by EMC.