ESP32S3 Stopped to Boot-up After Brownout Resets

[wuyuanyi]

I am using ESP32S3 WROOM1 N16R8 on my own PCB. Due to my faulty USB hub, my board may receive brownout reset randomly- and this is intended. However, I noticed that after a few sequential Brownout in tens of seconds, it no longer reboots. I checked the reset pin, power supply, etc. and they are all in normal range. what could possibly cause the esp to stuck after brownout?

[Sprite]

The brown-out detector works to give a quick reading on why an ESP32 malfunctions (without it, you may get weird behaviour from the CPU that e.g. may look like a spurious software issue; the BOD makes it immediately clear that the voltage level is out of spec), but it doesn't replace an external voltage monitor. You still need a proper external reset (using e.g. a voltage monitor chip) if you want your ESP32 to recover from a brownout 100% of the times.

[wuyuanyi]

The brown-out detector works to give a quick reading on why an ESP32 malfunctions (without it, you may get weird behaviour from the CPU that e.g. may look like a spurious software issue; the BOD makes it immediately clear that the voltage level is out of spec), but it doesn't replace an external voltage monitor. You still need a proper external reset (using e.g. a voltage monitor chip) if you want your ESP32 to recover from a brownout 100% of the times.

Thanks for the reply, Sprite. Did you mean that when brownout reset the MCU, it may still not reboot correctly - if the brownout condition was not fully recovered on startup? And an external voltage monitoring IC should be used to control the timing of reset?

[Ghost12214123]

The brown-out detector works to give a quick reading on why an ESP32 malfunctions (without it, you may get weird behaviour from the CPU that e.g. may look like a spurious software issue; the BOD makes it immediately clear that the voltage level is out of spec), but it doesn't replace an external voltage monitor. You still need a proper external reset (using e.g. a voltage monitor chip) if you want your ESP32 to recover from a brownout 100% of the times.

Thanks for the reply, Sprite. Did you mean that when brownout reset the MCU, it may still not reboot correctly - if the brownout condition was not fully recovered on startup? And an external voltage monitoring IC should be used to control the timing of reset?

Hi, I'm quite new to ESP, and recently I acquired ESP32-S3 board. After installing ESP IDE and ESP IDF through AIM I tried to connect my board to computer, but unfortunately while setting serial port got notification "No suitable target found for Port COM5". Tried another cable, another board (exactly same), verified connection to COM channel, but still get same shit. Does anyone know how to fix this?