esp8684 vs esp8685

chegewara
Posts: 2309
Joined: Wed Jun 14, 2017 9:00 pm

esp8684 vs esp8685

Postby chegewara » Wed Jan 05, 2022 3:58 pm

What is or will be the difference between esp8684 for which we can see a lot new PR in esp-idf and esp8685 which is avilable as preorder on mouser? Or maybe it is the same model?
https://eu.mouser.com/ProductDetail/Esp ... 7kOgifM%3D
https://eu.mouser.com/datasheet/2/891/E ... 530165.pdf


Happy new year

ESP_igrr
Posts: 2071
Joined: Tue Dec 01, 2015 8:37 am

Re: esp8684 vs esp8685

Postby ESP_igrr » Wed Jan 05, 2022 5:21 pm

I think some information about esp8684 was already published on Chinese websites (e.g. https://view.inews.qq.com/a/20211223A0AUX400), but it hasn't reached the official Espressif website yet. The brief summary looks like this:

ESP8685 has an ESP32-C3 silicon die packaged together with 2MB flash in a 4x4 mm QFN-28 package. This package doesn't have SPI Flash signals bonded out to package pads.
For comparison, ESP32-C3F2 also has an ESP32-C3 die and 2MB flash, but the package is 5x5mm QFN-32, and SPI Flash signals are bonded out.
For software developers, ESP32-C3F2 and ESP8685 are equivalent, you can use "esp32c3" target in ESP-IDF to compile software for them.

ESP8684 has an ESP32-C2 silicon die packaged together with (some amount of) flash in a 4x4 mm QFN-28 package. Just like the ESP8685, this package doesn't have SPI flash signals bonded out. ESP32-C2 is a lower-end chip compared to ESP32-C3, with less RAM and peripherals. Support for this chip is being added to ESP-IDF at the moment. I can't say yet whether ESP32-C2 will be marketed and sold only as part of ESP8684 package or separately as well.

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