RST Pin Functionality Overview
Thought for 1 min 56 sec
You’re pointing at RST, which is a Net Portal (a named net), not a device with its own datasheet. In this project, RST ties to the ESP32 module’s enable/reset pin: U1 EN (a.k.a. CHIP_EN). Below are the EN/CHIP_EN pin details taken from the module datasheet.
Source: ESP32-H2-WROOM-03 Datasheet (Espressif) – Datasheet
EN / CHIP_EN (ESP32-H2-WROOM-03)
- Function
- High: chip enabled (powered up).
- Low: chip disabled (powered down).
- Do not leave floating.
- Pin type and direction
- Digital input (chip enable/reset).
- Input characteristics (DC, 3.3 V, 25 C)
- High-level input threshold (VIH): at least 0.75 * VDD1
- Low-level input threshold (VIL): at most 0.25 * VDD1
- Input leakage currents: IIH <= 50 nA, IIL <= 50 nA
- Default biasing: internally pulled up
- Recommended external network (from module datasheet)
- 10 kΩ pull-up to VDD33
- 1 µF capacitor from EN to GND
- Special considerations
- Keep EN’s RC network close to U1 to reduce noise coupling.
- Since EN controls full chip power-down, avoid long/noisy traces and ensure a solid pull-up so it cannot float.
- For reliable power-on reset behavior, follow the 10 kΩ + 1 µF recommendation above.
- General MCU reset best practice: include a pull-up on reset/enable lines; diagnose EMI or supply sags if you observe spurious resets.
If you’d like, I can add the recommended 10 kΩ pull-up and 1 µF capacitor to EN on U1.
Add EN reset network
Confirm RST net connections
Add reset button
Check EN thresholds
Add programming header
