Unresolved issues with rk3399 UART and PBP adapter voltage
#4
(02-20-2020, 01:49 AM)vrabac Wrote: That was purpose I purchased UART-earphone jack adapter from pine64 store to be able to debug my PBP. Now can this be clarified if this jack adapter can be safe used?
it's not safe (unless you are able and wish to do trickery like described in this article). it has 5V on IO lines, while UART pins going to the SoC, need 3.0V. note, - not even 3.3V. the problem has been reported several times, here is a prominent example but, yeah, it is still not answered, that's why the thread.

(02-19-2020, 08:24 PM)Der Geist der Maschine Wrote: Both sides moved on in life and work now on new projects.
with the same rk3399 SoC and its 3.0V UARTs and 5V adapter? Big Grin I hope your answer was sarcasm. If this adapter is intended for using with Pinephone, Pinetab, it can f&ck them up too.
ANT - my hobby OS for x86 and ARM.


Messages In This Thread
RE: Unresolved issues with rk3399 UART and PBP adapter voltage - by z4v4l - 02-20-2020, 07:47 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  [Star64] UART activity stopped yogo1212 0 293 02-11-2024, 04:34 PM
Last Post: yogo1212
  [Article] Fixed the UART Interrupt and Platform-Level Interrupt Controller (Ox64) lupyuen 0 483 12-09-2023, 05:24 PM
Last Post: lupyuen
  [Article] RISC-V Ox64 BL808: UART Interrupt and Platform-Level Interrupt Controller lupyuen 1 562 12-03-2023, 04:24 AM
Last Post: WhiteHexagon
  [Article] Star64 JH7110 + NuttX RTOS: RISC-V Privilege Levels and UART Registers lupyuen 0 622 07-18-2023, 05:35 PM
Last Post: lupyuen
  Issues with PinePower Desktop superkamiguru 0 759 10-24-2022, 07:43 AM
Last Post: superkamiguru
  PinePower 120W Screen Issues t-3 3 1,795 09-26-2022, 05:14 PM
Last Post: superkamiguru
  Pine64 and PhoenixCard Issues sanji26 1 1,611 01-03-2022, 05:04 AM
Last Post: moonwalkers
  RK3399 vs RK3566 ? dieselnutjob 12 12,909 11-09-2021, 07:04 PM
Last Post: z4v4l
  Help with high voltage power supply setup for electrospinning? namarang 0 1,278 08-07-2021, 11:04 AM
Last Post: namarang
  Complain about all the PINE 64 "issues here" - let's have a bit of fun /snark dgdimick 0 1,480 03-27-2021, 12:54 AM
Last Post: dgdimick

Forum Jump:


Users browsing this thread: 1 Guest(s)