Need help with esp32 eFuse values

[Tanishq-Banyal]

Here are some eFuse values I got from espfuse.py summary :-

Code: Select all

XPD_SDIO_FORCE (BLOCK0):                 Ignore MTDI pin (GPIO12) for VDD_SDIO on reset     = False R/W (0b0)
XPD_SDIO_REG (BLOCK0):                   If XPD_SDIO_FORCE, enable VDD_SDIO reg on reset    = False R/W (0b0)
XPD_SDIO_TIEH (BLOCK0):                  If XPD_SDIO_FORCE & XPD_SDIO_REG                   = 1.8V R/W (0b0)
CLK8M_FREQ (BLOCK0):                     8MHz clock freq override                           = 51 R/W (0x33)

1. Can anybody explain to me that what does CLK8M_FREQ = 51 means ? I mean what speed does 51 specify ? is it running at 40mhz or 80mhz ?

2. I wish to set flash voltage to 1.8v forcefully, what should be XPD_SDIO_FORCE and XPD_SDIO_REG values ? I think it should be true for both, but i dont want to currupt my only board, so i am asking for confirmation.

3. How do you write boolean values with espfuse.py ?

[WiFive]

CLK8M_FREQ is calibration for the internal 8mhz oscillator, should not be changed by user

https://github.com/espressif/esptool/wi ... e-vdd_sdio