Texas Instruments TMS320C645x DSP manual Transmit Carrier Sense Errors Register Txcarriersense

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EMAC Port Registers

5.50.25 Transmit Carrier Sense Errors Register (TXCARRIERSENSE)

The total number of frames on the EMAC that experienced carrier loss. Such a frame is defined as having all of the following:

∙Was any data or MAC control frame destined for any unicast, broadcast, or multicast address

∙Was any size

∙The carrier sense condition was lost or never asserted when transmitting the frame (the frame is not re-transmitted)

CRC errors and underrun have no effect on this statistic.

5.50.26 Transmit Octet Frames Register (TXOCTETS)

The total number of bytes in all 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

5.50.27Transmit and Receive 64 Octet Frames Register (FRAME64)

The total number of 64-byte frames received and transmitted on the EMAC. Such a 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

∙Did not experience late collisions, excessive collisions, underrun, or carrier sense error

∙Was exactly 64-bytes long. (If the frame was being transmitted and experienced carrier loss that resulted in a frame of this size being transmitted, then the frame is recorded in this statistic).

CRC errors, alignment/code errors, and overruns do not affect the recording of frames in this statistic.

5.50.28 Transmit and Receive 65 to 127 Octet Frames Register (FRAME65T127)

The total number of 65-byte to 127-byte frames received and transmitted on the EMAC. Such a 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

∙Did not experience late collisions, excessive collisions, underrun, or carrier sense error

∙Was 65-bytes to 127-bytes long

CRC errors, alignment/code errors, under-runs, and overruns do not affect the recording of frames in this statistic.

5.50.29 Transmit and Receive 128 to 255 Octet Frames Register (FRAME128T255)

The total number of 128-byte to 255-byte frames received and transmitted on the EMAC. Such a 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

∙Did not experience late collisions, excessive collisions, underrun, or carrier sense error

∙Was 128-bytes to 255-bytes long

CRC errors, alignment/code errors, under-runs, and overruns do not affect the recording of frames in this statistic.

142 Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO) SPRU975B –August 2006

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