[UAEFI rev. E] No supply at +5VP #94
Description
UEFI rev. E (firmware rusEFI master.2025.09.14.uaefi.3006736821) - board does not seem to fully initialise its internal voltage regulator for +5VP.
When the board is powered from USB or a bench PSU with a voltage of >12V at the (+12_KEY and +12), the voltage at +5VP is around 0.5V.
I made a modification suggested in another issue. But there has been no improvement.
5v bridge to EN on tls115 external 5v regulator, (5v to pin 7)
a fix has been proposed and tested for basic functionality
Originally posted by @ggurov in #59
Here are some +5VP scopes.
powered by USB:
bench power supply:
I did four resets by unplugging the wires in both cases.
As you can see, the voltage is correct during the POR state. However, right after the main MCU is up, the voltage drops to 0.5 V.