Confusion about pins 35-37 not working in Octal Flash ESP32 S3 chips
Posted: Fri Jun 21, 2024 2:36 am
Hi,
ESP32 S3 datasheet specifies that pins 35-37 on octal PSRAM S3 modules are not accessible. I have confirmed that working with any octal PSRAM DevKit that I have.
However, I have designed and manufactured a PCB that has an octal PSRAM S3 module on it (ESP32-S3-WROOM-1U-N16R8) and it turns out those pins are available for any application (currently sending I2C to GPIO 36 ad 37 and it works flawlessly).
Can anyone explain why this is happening? Based on the datasheet, I should not be able to work with those pins which is true when I use the devkit, but somehow when using the module on a pcb, the pins are available.
Thanks
ESP32 S3 datasheet specifies that pins 35-37 on octal PSRAM S3 modules are not accessible. I have confirmed that working with any octal PSRAM DevKit that I have.
However, I have designed and manufactured a PCB that has an octal PSRAM S3 module on it (ESP32-S3-WROOM-1U-N16R8) and it turns out those pins are available for any application (currently sending I2C to GPIO 36 ad 37 and it works flawlessly).
Can anyone explain why this is happening? Based on the datasheet, I should not be able to work with those pins which is true when I use the devkit, but somehow when using the module on a pcb, the pins are available.
Thanks