LAN91C96I Datasheet, PDF (38/110 Pages) SMSC Corporation – NON-PCI SINGLE-CHIP FULL DUPLES ETHERNET CONTROLLER

Non-PCI Single-Chip Full Duplex Ethernet Controller
LATCOL - Late collision detected on last transmit frame. If set a late collision was detected (later than 64
byte times into the frame). When detected the transmitter JAMs and turns itself off clearing the TXENA bit
in TCR. Cleared by setting TXENA in TCR.
WAKEUP - When this bit is set, it indicates that a receive packet was received that had the “Magic” packet
(MP) signature of the node’s own Individual address repetitions in it. This bit indicates a valid detection for
magic packet.
TX_DEFR - Transmit Deferred. When set, carrier was detected during the first 6.4 uSec 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 us window 0.8 us after 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. 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 - Last transmit was successful. Set if transmit completes without a fatal error. This bit is cleared
by the start of a new frame transmission or when TXENA is set high.
Fatal errors are:
ƒ 16 collisions
ƒ SQET fail and STP_SQET = 1
ƒ FIFO Underrun
ƒ Carrier lost and MON_CSN = 1
ƒ Late collision
Rev. 11/18/2004
Page 38
DATASHEET
SMSC DS – LAN91C96I