am79c961a Advanced Micro Devices, am79c961a Datasheet - Page 125

• Manufacturer Part Number: am79c961a
• Description: Pcnet?-isa Ii Jumperless, Full Duplex Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

09-00
TDR
medium. If DRTY = 1 in the
MODE register, RTRY will set
after one failed transmission at-
tempt. RTRY is written by the
PCnet-ISA II controller.
TIME DOMAIN REFLECTOME-
TRY reflects the state of an inter-
nal
counter that counts at a 10 MHz
rate from the start of a transmis-
sion to the occurrence of a colli-
sion or loss of carrier. This value
PCnet-ISA
II
controller
Am79C961A
is useful in determining the
approximate distance to a cable
fault. The TDR value is written
by the PCnet-ISA II controller
and is valid only if RTRY is set.
Note that 10 MHz gives very low
resolution and in general has not
been found to be particularly
useful. This feature is here
primarily to maintain full compat-
ibility with the LANCE.
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