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Architecture
3.2.5.5.11 Pass CRC (PASSCRC) Flag
This flag is set by the EMAC in the SOP buffer descriptor if the received packet includes the 4-byte CRC.
This flag should be cleared by the software application before submitting the descriptor to the receive
queue.
3.2.5.5.12 Jabber Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet is a jabber frame and was
not discarded because the RXCEFEN bit was set in the RXMBPENABLE. Jabber frames are frames that
exceed the RXMAXLEN in length, and have CRC, code, or alignment errors.
3.2.5.5.13 Oversize Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet is an oversized frame and
was not discarded because the RXCEFEN bit was set in the RXMBPENABLE.
3.2.5.5.14 Fragment Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet is only a packet fragment
and was not discarded because the RXCEFEN bit was set in the RXMBPENABLE.
3.2.5.5.15 Undersized Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet is undersized and was
not discarded because the RXCSFEN bit was set in the RXMBPENABLE.
3.2.5.5.16 Control Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet is an EMAC control frame
and was not discarded because the RXCMFEN bit was set in the RXMBPENABLE.
3.2.5.5.17 Overrun Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet was aborted due to a
receive overrun.
3.2.5.5.18
Code Error (CODEERROR) Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet contained a code error
and was not discarded because the RXCEFEN bit was set in the RXMBPENABLE.
3.2.5.5.19
Alignment Error (ALIGNERROR) Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet contained an alignment
error and was not discarded because the RXCEFEN bit was set in the RXMBPENABLE.
3.2.5.5.20
CRC Error (CRCERROR) Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet contained a CRC error
and was not discarded because the RXCEFEN bit was set in the RXMBPENABLE.
3.2.5.5.21
No Match (NOMATCH) Flag
This flag is set by the EMAC in the SOP buffer descriptor, if the received packet did not pass any of the
EMAC's address match criteria and was not discarded because the RXCAFEN bit was set in the
RXMBPENABLE. Although the packet is a valid Ethernet data packet, it was only received because the
EMAC is in promiscuous mode.
424
EMAC/MDIO Module
Preliminary
© 2011, Texas Instruments Incorporated
www.ti.com
SPRUGX9 – 15 April 2011
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