Search found 11 matches
- Thu Aug 11, 2022 6:40 pm
- Forum: Hardware
- Topic: how can connect esp32-s3 to the sd card in 4-bit sdio protocol
- Replies: 5
- Views: 8071
Re: how can connect esp32-s3 to the sd card in 4-bit sdio protocol
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...
- Fri Jun 24, 2022 5:31 pm
- Forum: Hardware
- Topic: Cannot program ESP32-U4WDH Flash, flash not detected.
- Replies: 5
- Views: 4194
Re: Cannot program ESP32-U4WDH Flash, flash not detected.
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...
- Wed Jun 08, 2022 9:38 pm
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
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 ...
- Sat Jun 04, 2022 5:43 pm
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
Thank you again for your help.
Espressif does a great job supporting their user community - other companies should take note of this.
Espressif does a great job supporting their user community - other companies should take note of this.
- Sat Jun 04, 2022 4:42 am
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
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...
- Thu Jun 02, 2022 3:14 pm
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
Hi, any word on this topic? We're waiting to order some prototype boards.
Thanks again for your help!
Thanks again for your help!
- Tue May 31, 2022 6:24 am
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
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,
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,
- Tue May 31, 2022 6:18 am
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
Re: ESP32-U4DWH - analog power supply design when not using WiFi
Thank you! Hopefully we can avoid the decoupling capacitors to save board space.
- Tue May 31, 2022 2:36 am
- Forum: Hardware
- Topic: ESP32-U4DWH - analog power supply design when not using WiFi
- Replies: 13
- Views: 6706
ESP32-U4DWH - analog power supply design when not using WiFi
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...
- Tue May 31, 2022 2:31 am
- Forum: Hardware
- Topic: Crystal recommendation for ESP32-U4DWH
- Replies: 2
- Views: 1484
Re: Crystal recommendation for ESP32-U4DWH
Thank you very much for the quick reply!