![5.50.21 Transmit Multiple Collision Frames Register (TXMULTICOLL)](/images/new-backgrounds/123159/123159257x1.webp)
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Ethernet Media Access Controller (EMAC) Registers
CRC errors have no effect on this statistic.
5.50.21 Transmit Multiple Collision Frames Register (TXMULTICOLL)
The total number of frames transmitted on the EMAC that experienced multiple collisions. 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
∙Had no carrier loss and no underrun
∙Experienced 2 to 15 collisions before being successfully transmitted. None of the collisions were late.
CRC errors have no effect on this statistic.
5.50.22 Transmit Excessive Collision Frames Register (TXEXCESSIVECOLL)
The total number of frames when transmission was abandoned due to excessive collisions. 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
∙Had no carrier loss and no underrun
∙Experienced 16 collisions before abandoning all attempts at transmitting the frame. None of the collisions were late.
CRC errors have no effect on this statistic.
5.50.23 Transmit Late Collision Frames Register (TXLATECOLL)
The total number of frames when transmission was abandoned due to a late collision. 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
∙Had no carrier loss and no underrun
∙Experienced a collision later than 512
CRC errors, carrier loss, and underrun have no effect on this statistic.
5.50.24 Transmit Underrun Error Register (TXUNDERRUN)
The number of frames sent by the EMAC that experienced FIFO underrun. Late collisions, CRC errors, carrier loss, and underrun have no effect on this statistic.
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 retransmitted)
CRC errors and underrun have no effect on this statistic.
Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO) | 129 |
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