SMC Networks SMC91C95 Product Manual page 43

detection for magic packet
nWAKEUPEN pin (92 QFP) or WAKEUP_EN in
CTR.
NOTE: If the MP mode is activated using the
nWAKEUPEN pin, the pin must be deasserted to
exit the mode.
TX_DEFR - Transmit Deferred. When set, carrier
was detected during the first 6.4 sec of the inter
frame gap. Cleared at the end of every packet
sent.
LTX_BRD - Last transmit frame was a broadcast.
Set if frame was broadcast. Cleared at the start of
every transmit frame.
SQET - Signal Quality Error Test. The transmitter
opens a 1.6 sec window 0.8
transmission is completed and the receiver returns
inactive. During this window, the transmitter
expects to see the SQET signal from the
transceiver. The absence of this signal is a 'Signal
Quality Error' and is reported in this status bit.
Transmission stops and EPH INT is set if
STP_SQET is in the TCR is also set when SQET
is set. This bit is cleared by setting TXENA high.
16COL- 16 collisions reached. Set when 16
collisions are detected for a transmit frame.
- enabled by TXENA bit in TCR is reset. Cleared when TXENA
is set high.
LTX_MULT - Last transmit frame was a multicast.
Set if frame was a multicast. Cleared at the start
of every transmit frame.
MULCOL - Multiple collision detected for the last
transmit frame. Set when more than one collision
was experienced. Cleared when TX_SUC is high
at the end of the packet being sent.
SNGLCOL - Single collision detected for the last
transmit frame. Set when a collision is detected.
Cleared when TX_SUC is high at the end of the
packet being sent.
TX_SUC
transmit completes without a fatal error. This bit is
sec after
cleared by the start of a new frame transmission or
when TXENA is set high.
Fatal errors are:
43
- Last transmit was successful. Set if
16 collisions
SQET fail and STP_SQET = 1
FIFO Underrun
Carrier lost and MON_CSN = 1
Late collision