Peripherals—IP2022 User’s Manual 284 www.ubicom.com TXBE Transmit buffer empty interrupt flag 0 =    Transmit buffer has not been empty since this           bit was last cleared
1 =    Transmit buffer has been empty 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 10Base-T mode: 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 USB mode: 0 =    SERDES is transmitting
1 =    SERDES is not transmitting 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 Name Description