ATOM Lite esp32-pico-d4 5V tolerant inputs?
LukeS last edited by
The ATOM Lite has a 5V output for the GROVE port but the esp32-pico-d4 uC datasheet says the max digitals high level input is VDD+0.3. The ATOM Lite is powering the ESP32 with 3.3V so that means the max voltage on the i2c SCL & SCA pins would be 3.6V.
Why does the ESP32 output 5V on the GROVE port it if can't accept 5V digital inputs. Do all i2c devices require their own 5V -> 3.3V step down converter then?
felmue last edited by
yes, that is correct, a step down converter is required.
I think the reason behind the decision to have 5 V on the Groove port is to be able to deliver more energy. In the original M5Stack the 5 V are coming directly from USB whereas the 3.3 V comes from the internal regulator which is limited in what amperage it can deliver.
ajb2k3 last edited by
All esp’s are like modern controllers are only 3.3V tolerant, the 5v on the grove is for the grove Standered and for sensors that still require 5v.