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ESP32-S3FHR2 External Crystal
Posted: Mon Apr 13, 2026 7:00 pm
by imraan
Hello, I am planning on moving to ESP32-S3FH4R2, from ESP32-PICO-D4 due to extra GPIOs. Does the ESP32-S3FH4R2 have internal 40MHz crystal similar to the ESP32-PICO-D4, or do I need to install one? Thanks.
Re: ESP32-S3FHR2 External Crystal
Posted: Tue Apr 14, 2026 2:22 pm
by ves011
AFAIK, ESP32-PICO-D4 is a module while ESP32-S3FH4R2 it's a SoC only. SoCs do not have anything around so the answer is no.
You might look to ESP32-S3-WROOM-x which is a module and has the external crystal.
Re: ESP32-S3FHR2 External Crystal
Posted: Tue Apr 14, 2026 4:04 pm
by MicroController
AFAIK, ESP32-PICO-D4 is a module ...
Was also my first thought. However, as it turns out,
[t]he ESP32-PICO series is a System-in-Package (SiP) device that is based on the ESP32 SoC. [...] It
integrates all peripheral components seamlessly in a single package, including a crystal oscillator, filter
capacitors, [...]
Re: ESP32-S3FHR2 External Crystal
Posted: Thu Apr 16, 2026 12:57 am
by imraan
Thank you for your help, much appreciated.
It seems that the ESP32-S3FHR2 has the Flash integrated into the package, but the crystal is not. I concluded this by finding some reference designs that use this device & they had to add an external crystal.
I ended up selecting the ESP32-S3-PICO-1, which is also a 56-pin package, 7mmx7mm. The package includes 8MB Flash, 2MB PSRAM & crystal. This takes care of my needs for additional IOs & limited space PCB.