Brawell PLTRST# Issue

KChen85 · ‎07-24-2016

Hi,

There is a issue about PLTRST# . The platform is Braswell N3010 and TI PMIC (TPS650842). I do the power up without BIOS code, the power sequence seems to be good, but PLTRST# can't rise up after the VCCAPWROK & COREPWROK asserted by PMIC, and lpc_clkout0 is low. Then i check the 19.2MHz crystal. I removed the C1&C2(both 18pF), and used the scope probe touch the OSCIN & OSCOUT pin several times, after that lpc_clkout0 outputs 19.2MHz clock wave at 3.3V amplitude and the PLTRST# rise up! I reproduced this phenomenon 5-10 times, the number of probe touch times is different, it's hard to reproduce. What's the issue?

the attached file is 19.2MHz OSCIN&OSCOUT scope shot.

OSCIN:

OSCOUT

Thanks,

Kevin

idata · ‎07-27-2016

Hi Kevin,

I sent you a private message.

Regards,

Mike C

idata · ‎07-28-2016

Hi Kevin,

I answered you through the private message.

Mike C