Texas Instruments TMS320DM646x User Manual page 127

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To determine the number of receive frames discarded by the EMAC for any reason, sum the following
statistics (promiscuous mode disabled):
Receive fragments
Receive undersized frames
Receive CRC errors
Receive alignment/code errors
Receive jabbers
Receive overruns
Receive filtered frames
This may not be an exact count because the receive overruns statistic is independent of the other
statistics, so if an overrun occurs at the same time as one of the other discard reasons, then the above
sum double-counts that frame.
5.50.12 Receive QOS Filtered Frames Register (RXQOSFILTERED)
The total number of frames received on the EMAC that were filtered due to receive quality of service
(QOS) filtering. Such a frame is defined as having all of the following:
Any data or MAC control frame that matched a unicast, broadcast, or multicast address, or matched
due to promiscuous mode
The frame destination channel flow control threshold register (RXnFLOWTHRESH) value was
greater than or equal to the channel's corresponding free buffer register (RXnFREEBUFFER) value
Was of length 64 to RXMAXLEN
RXQOSEN bit is set in RXMBPENABLE
Had no CRC error, alignment error, or code error
See Section 2.5.5
statistic.
5.50.13 Receive Octet Frames Register (RXOCTETS)
The total number of bytes in all good frames received on the EMAC. A good frame is defined as having
all of the following:
Any data or MAC control frame that matched a unicast, broadcast, or multicast address, or matched
due to promiscuous mode
Was of length 64 to RXMAXLEN bytes inclusive
Had no CRC error, alignment error, or code error
See Section 2.5.5
statistic.
5.50.14 Good Transmit Frames Register (TXGOODFRAMES)
The total number of good frames transmitted on the EMAC. A good frame is defined as having all of the
following:
Any data or MAC control frame that was destined for any unicast, broadcast, or multicast address
Was any length
Had no late or excessive collisions, no carrier loss, and no underrun
5.50.15 Broadcast Transmit Frames Register (TXBCASTFRAMES)
The total number of good broadcast frames transmitted on the EMAC. A good broadcast frame is
defined as having all of the following:
Any data or MAC control frame destined for address FF-FF-FF-FF-FF-FFh only
Was of any length
Had no late or excessive collisions, no carrier loss, and no underrun
SPRUEQ6 – December 2007
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for definitions of alignment, code, and CRC errors. Overruns have no effect on this
for definitions of alignment, code, and CRC errors. Overruns have no effect on this
Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO)
Ethernet Media Access Controller (EMAC) Registers
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