Hello, Related to this question, we are looking to use the ESP32-S3-WROOM-2-N32R8V in a project. We want to attach an SD card in 4 bit mode. Per the datasheet, it appears the -S3 supports two separate SD card "slots". * Would we be able to connect the SD card in 4 bit mode independent of the interna...

This piqued my interest. I couldn't find anywhere in the datasheet - or in the technical reference manual, or hardware integration guide - any mention of GPIO16, GPIO17 recommending not being connected for flashing firmware. Right now I have these connected to a button and used as an output to an LC...

Hi, actually, the hardware design guidelines were very helpful for me: https://www.espressif.com/sites/default/files/documentation/esp32_hardware_design_guidelines_en.pdf Aside from the notes in this thread, I also omitted the sensor caps. For the analog section I just used a 0.1uF capacitor; we'll ...

Thank you again for your help.

Espressif does a great job supporting their user community - other companies should take note of this.

No problem, thanks for the reply. I'm making just a simplified version of it with 0.1uF capacitors and tying to 3.3v. Two more questions: * For the RC network on CAP2 on Pin 47 - if we don't care about power consumption for sleep mode, we can leave Pin 47 disconnected, right? * For VDD_SDIO - as I u...

Hi, any word on this topic? We're waiting to order some prototype boards.

Thanks again for your help!

While we're at it, there's a recommended 499R resistor on U0TXD and a possible resistor on the Crystal XIN.

These are *only* to mitigate RF issues, correct? So if we're not using the RF side, we can omit these parts?

Thank you again,

Thank you! Hopefully we can avoid the decoupling capacitors to save board space.

We are using the ESP32-U4DWH chip without the WiFi features (WiFi will not be used at all). The hardware design guidelines discusses the design of the analog power supply, including capacitors and the LC filter circuit for pins 1,3,4, 43 and 46. How should I design the analog supply if WiFi will not...

Thank you very much for the quick reply!