LPC Microcontrollersのトピックlpc2366 lpc2368 ethernet 100M issue

lpc2366 lpc2368 ethernet 100M issue

odescoubes — Tue, 21 Apr 2020 08:24:30 GMT

Hello everybody,

I am using the LPC2366 with the DP83848 since several years, working fine until now : with the change of processor date code (previous date code was year 2007, and now date code is year 2018) : with this latest date code, the ethernet link works only at 10M , and no more at 100M.

Has anybody already been faced with this problem?

Olivier

Re: lpc2366 lpc2368 ethernet 100M issue

vicentegomez — Wed, 22 Apr 2020 17:52:48 GMT

I am working on your problem on the internal case,

but can you perform a swap test?

Maybe there is a problem with the hardware.

I will continue helping you on the internal case

Regards

Vicente Gomez

Re: lpc2366 lpc2368 ethernet 100M issue

odescoubes — Thu, 23 Apr 2020 07:16:10 GMT

Hi ,

we have connected the 50MHZ oscillator output direclty to the processor ethernet_clock_input (instead of using the 25MHZ_OUT of the PHY), and it works fine now.

It looks like the 'B' revision of the processor can work with the 25MHZ_OUT signal, whereas the 'D' revision of the processor can't.

But why this issue wasn't included in the LPC23xx Errata sheet?

Regards

Olivier

Re: lpc2366 lpc2368 ethernet 100M issue

vicentegomez — Thu, 23 Apr 2020 22:27:49 GMT

Due the LPC2xxx is old I need to check where this is documented.

regards