a questions about burn mode

Zxc123456
Posts: 8
Joined: Wed Apr 17, 2019 2:48 am

a questions about burn mode

Postby Zxc123456 » Wed Apr 17, 2019 3:17 am

I use the ESP32_Devkitc_V4 development board. Why the board is not in burn mode?I still can download th bootload core.I looked up information for esp32 datasheet. It say when board in burn mode the GPIO0 must be pull-down。So how do i know the GPIO0 status?

commando_j
Posts: 25
Joined: Tue Feb 05, 2019 5:26 pm

Re: a questions about burn mode

Postby commando_j » Wed Apr 17, 2019 7:22 pm

On your kit, GPIO 0 is pulled up internally and has a button to pull down the IO when you need it.

Zxc123456
Posts: 8
Joined: Wed Apr 17, 2019 2:48 am

Re: a questions about burn mode

Postby Zxc123456 » Thu Apr 18, 2019 7:05 am

Thanks for your reply.My question is i'm not push the button.i still can download the core for the board.But the datasheet say's if you will download core the GPIO0 must be pull down.So i'm confused.

WiFive
Posts: 2952
Joined: Tue Dec 01, 2015 7:35 am

Re: a questions about burn mode

Postby WiFive » Thu Apr 18, 2019 7:27 am

It also has a automatic boot mode circuit, check schematic

https://github.com/espressif/esptool/wi ... bootloader

Zxc123456
Posts: 8
Joined: Wed Apr 17, 2019 2:48 am

Re: a questions about burn mode

Postby Zxc123456 » Thu Apr 18, 2019 10:01 am

Many thanks for your advice. Such is the case.Have learned.

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