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374 Software Developer’s Manual
General Initialization and Reset Operation
• Configure the Collision Threshold (TCTL.CT) to the desired value. Ethernet standard is 10h.
This setting only has meaning in half duplex mode.
• Configure the Collision Distance (TCTL.COLD) to its expected value. For full duplex
operation, this value should be set to 40h. For gigabit half duplex, this value should be set to
200h. For 10/100 half duplex, this value should be set to 40h.
Program the Transmit IPG (TIPG) register with the following decimal values to get the minimum
legal Inter Packet Gap:
Fiber Copper
Fiber
(82544GC/EI
Copper
(82544GC/EI
IPGT 10 10 6 8
IPGR1 10 10 8
a
a. Applicable to the 82541xx and 82547GI/EI.
8
a
IPGR2 10 10 6
a
6
a