I figure out the issue.
In my custom board I have an external coin battery. I forgot to insert a battery in my test and the VDD_VBAT (pin 103) was floating.
This scenarious activate the ESP32P4 protection, causing the boot issues.
If you having this troubles, check the chapter 2.6.3 Chip Power-up ...
Search found 3 matches
- Mon Feb 16, 2026 6:12 pm
- Forum: Hardware
- Topic: ESP32-P4 Custom Board: CHIP_PU stuck at ~1.2V on power-on, requires manual reset to boot
- Replies: 4
- Views: 248
- Mon Feb 09, 2026 1:30 am
- Forum: Hardware
- Topic: ESP32-P4 Custom Board: CHIP_PU stuck at ~1.2V on power-on, requires manual reset to boot
- Replies: 4
- Views: 248
Re: ESP32-P4 Custom Board: CHIP_PU stuck at ~1.2V on power-on, requires manual reset to boot
Hi,
no capacitor, only pull-ups from 10K.
no capacitor, only pull-ups from 10K.
- Sat Feb 07, 2026 2:02 am
- Forum: Hardware
- Topic: ESP32-P4 Custom Board: CHIP_PU stuck at ~1.2V on power-on, requires manual reset to boot
- Replies: 4
- Views: 248
ESP32-P4 Custom Board: CHIP_PU stuck at ~1.2V on power-on, requires manual reset to boot
Hi,
We are developing a custom board based on the ESP32-P4 and are experiencing a consistent issue where the chip fails to boot on initial power-up. The CHIP_PU pin stabilizes at approximately 1.2V instead of the expected 3.3V, and the USB Serial/JTAG interface is never recognized by the host PC. A ...
We are developing a custom board based on the ESP32-P4 and are experiencing a consistent issue where the chip fails to boot on initial power-up. The CHIP_PU pin stabilizes at approximately 1.2V instead of the expected 3.3V, and the USB Serial/JTAG interface is never recognized by the host PC. A ...