ESP32 Forum

HI,

is somewhere documented how the eFuses are set when the module comes fresh from the espressif-factory? Are there differences between different modules like esp32-s3-wroom-1u-n8r8 vs esp32-s3-wroom-1u-n16r8 ?

Best

Hi Jonathan2892,

These two modules will have the same eFuse settings (other than different unique IDs). They only differ in flash size, which will get detected at run time.

Hi,

thank you for the reply. Is anywhere documented what the factory settings of the eFuses are? Like, which one is already set to 1 and which not?

Best

I don't think this is documented in a single place. There is some information in the chip TRM, eFuse chapter. Generally, the following eFuses will be burnt in the factory:

• chip version related — at chip production time
• package (SIP) type related — at chip production time
• MAC & optional unique ID — at chip production time
• ADC and temperature sensor calibration — if required for the given chip; at chip production time
• if the module uses Octal SPI flash, corresponding eFuse will be set — at module production time

Other eFuses, especially the ones which disable certain features, won't be burned.

I'll ask our documentation team if this is the kind of information that can be included into the chip or module datasheet.