LAN91C96IQFP datasheet(37/109 Pages) SMSC

37 / 109 page

Non-PCI Single-Chip Full Duplex Ethernet Controller

SMSC DS – LAN91C96I

Page 37

Rev. 03-28-07

DATASHEET

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:

16 collisions

SQET fail and STP_SQET = 1

FIFO Underrun

Carrier lost and MON_CSN = 1

Late collision

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