Datasheet

576
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
37.5.26.11Transmit Underrun Errors Register
Register Name: EMAC_TUND
Access Type: Read-write
• TUND: Transmit Underruns
An 8-bit register counting the number of frames not transmitted due to a transmit DMA underrun. If this register is incremented,
then no other statistics register is incremented.
37.5.26.12Carrier Sense Errors Register
Register Name: EMAC_CSE
Access Type: Read-write
• CSE: Carrier Sense Errors
An 8-bit register counting the number of frames transmitted where carrier sense was not seen during transmission or where car-
rier sense was deasserted after being asserted in a transmit frame without collision (no underrun). Only incremented in half-
duplex mode. The only effect of a carrier sense error is to increment this register. The behavior of the other statistics registers is
unaffected by the detection of a carrier sense error.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––––
76543210
TUND
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––––
76543210
CSE