SMC Networks SMC91C95 Product Manual page 41

LOOP - Local Loopback. When set, transmit
frames are internally looped to the receiver after
the encoder/decoder. Collision and Carrier Sense
are ignored. No data is sent out. Defaults low to
normal mode.
AUI FDSE FDUPLX
X X
X X
1 0
0 0
X 0
X 1
EPH_LOOP LOOP
X 1
1 0
1 0
1 0
0 0
1 0
41
TXENA - Transmit enabled when set. Transmit is
disabled if clear. When the bit is cleared, the
SMC91C95 will complete the current transmission
before stopping. When stopping due to an error,
this bit is automatically cleared.
LOOPS AT
X EPH Block
1 ENDEC
0 Cable
0 10BASE-T Driver
0 Normal CSMA/CD - No
Loopback
0 Full Duplex Switched
Ethernet - No loopback
and no SQET
TRANSMITS
TO
NETWORK
No
No
Yes
Yes
Yes
Yes