[U-Boot-Users] transmission just works in loopback mode

23 Feb
2006
23 Feb
'06
7:39 p.m.
Dear u-boot users,
i used the MPC875 FEC internal loopback mode and the external transceiver-loopback mode. In both cases i could send *and* receive the data.
But when using no loopback at all, but a (working) crossover cable to connect the board to a second PC (see below), no packets get received there. Where could the failure be ?
MPC875 <-> transceiver(LTX970) <-> RJ45-connector <-> crossover -cable <-> second PC with RJ54-connector
my custom board contains a MPC875, whose FEC is connected to a LTX970 transceiver chip, which uses a twisted pair cable interface.
best regards Josef
7012
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7012
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Josef Angermeier