topic Re: RJ-45 connection in LPCXpresso IDE

RJ-45 connection

lpcware — Thu, 16 Jun 2016 01:58:34 GMT

Content originally posted in LPCWare by Prithvi on Fri Feb 25 11:11:17 MST 2011
Hi everyone,
I am making the connection to a RJ-45 connector from the ethernet's TXP, TXN, RXP and RXN of the LPCXpresso1769 board using the following connections:
TXP- 1
3.3V - 2
TXN - 3
RXP - 4
3.3V - 5
RXN - 6
(unconnected) - 7
GND -8
And 0.1 uF decoupling caps between the two 3.3V pins and GND.
I have a few questions:
1. Which kind of cabling do i need to use for connection to a PC? Cross-connected or straight?
2. In the RJ-45 that i have I get a beep in the mulimeter between the cable pins and the board pins indicating a short. Does this mean that it does not have integerated magnetics? What'll happen if I use a RJ-45 without magnetics?
Thanks,
Prithvi

Re: RJ-45 connection

lpcware — Thu, 16 Jun 2016 01:58:35 GMT

Content originally posted in LPCWare by Ex-Zero on Fri Feb 25 11:32:47 MST 2011
See:

http://knowledgebase.nxp.com/showthread.php?t=1499&highlight=magjack

Should answer your questions...

Re: RJ-45 connection

lpcware — Thu, 16 Jun 2016 01:58:35 GMT

Content originally posted in LPCWare by Prithvi on Fri Feb 25 12:42:33 MST 2011
Thanks a lot.
That answered all my questions. :D