Hello,
I was unable to find in the ESP32 various documentations what is the ESP32 GPIO behaviour
when all VDD pins are powered but CHIP_PU (Enable/Reset) is held low.
In our future product the ESP32 will be connected to an STM32F7 microcontroller, both on UART and SDIO interfaces.
When the STM32 is started on bootloader mode for fimrware update the internal bootloader initialize some internal ressources so
some pins on the UART or SDIO interface will be pulled-up to 3.3V with typical internal resistors of 40KOhm.
In this state the ESP32 will have all VDD pins powered but the Enable pin will be low (reset state).
Will the ESP32 be able to handle current limited voltages on GPIO pins with all VDD=3.3V and EN pin =0?
Since the injection current will be limited with the serial 40K pull-up resistors, will the ESP32 be able
to secure handle this case even with VDD=0V?
Thanks
Best regards
Christian
ESP32 VDD Power / Enable pin and GPIO
-
- Posts: 2
- Joined: Wed Aug 01, 2018 4:05 pm
Jump to
- English Forum
- Explore
- News
- General Discussion
- FAQ
- Documentation
- Documentation
- Sample Code
- Discussion Forum
- Hardware
- ESP-IDF
- ESP-BOX
- ESP-ADF
- ESP-MDF
- ESP-WHO
- ESP-SkaiNet
- ESP32 Arduino
- IDEs for ESP-IDF
- ESP-AT
- ESP IoT Solution
- ESP RainMaker
- Rust
- ESP8266
- Report Bugs
- Showcase
- Chinese Forum 中文社区
- 活动区
- 乐鑫活动专区
- 讨论区
- 全国大学生物联网设计竞赛乐鑫答疑专区
- ESP-IDF 中文讨论版
- 《ESP32-C3 物联网工程开发实战》书籍讨论版
- 中文文档讨论版
- ESP-AT 中文讨论版
- ESP-BOX 中文讨论版
- ESP IoT Solution 中文讨论版
- ESP-ADF 中文讨论版
- ESP Mesh 中文讨论版
- ESP Cloud 中文讨论版
- ESP-WHO 中文讨论版
- ESP-SkaiNet 中文讨论版
- ESP 生产支持讨论版
- 硬件问题讨论
- 项目展示
Who is online
Users browsing this forum: No registered users and 124 guests
- All times are UTC
- Top
- Delete cookies
About Us
Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. ESP8266EX and ESP32 are some of our products.