EMAC Module Registers
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SPNU563A–March 2018
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EMAC/MDIO Module
32.5.50.25 Transmit Carrier Sense Errors Register (TXCARRIERSENSE) (offset = 260h)
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
retransmitted)
CRC errors and underrun have no effect on this statistic.
32.5.50.26 Transmit Octet Frames Register (TXOCTETS) (offset = 264h)
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
32.5.50.27 Transmit and Receive 64 Octet Frames Register (FRAME64) (offset = 268h)
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.
32.5.50.28 Transmit and Receive 65 to 127 Octet Frames Register (FRAME65T127) (offset = 26Ch)
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, underruns, and overruns do not affect the recording of frames in this
statistic.
32.5.50.29 Transmit and Receive 128 to 255 Octet Frames Register (FRAME128T255) (offset = 270h)
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, underruns, and overruns do not affect the recording of frames in this
statistic.
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