Register Quick Reference—IP2022 User’s Manual 416 www.ubicom.com TXEOP Transmit underrun. This bit is set when the previous data
in the transmit buffer register (SxTXBUF) has been trans-
mitted and no new data has been loaded in the register. In
USB and 10Base-T modes, this causes an EOP condition
to be generated. 0 =    Transmit underrun has not occurred since this           bit was last cleared
1 =    Transmit underrun has occurred SXLINKPULSE Set after a link pulse of 75 to 250 ns duration is detected. 0 =    No link pulse has been detected since this bit           was last cleared
1 =    Link pulse detected RXBF Receive buffer full interrupt flag 0 =    Receive buffer has not been full since this bit           was last cleared
1 =    Receive buffer has been full RXBUSY Receive buffer busy interrupt flag. This bit can be used to
check whether data is being received before entering a
low-power mode. 0 =    No new data has been received since this bit was last cleared 1 =    New data has been (or is being) received Name Description