Espressif ESP32 Technical Reference Manual page 535

20 eFuse Controller
31
0 0 0 0 0 0 0 0 0
EFUSE_RD_CHIP_VER_PKG These are the first three identification bits of chip packaging version
among the four identification bits. (RO)
EFUSE_RD_SPI_PAD_CONFIG_HD This field returns the value of SPI_pad_config_hd. (RO)
EFUSE_RD_CHIP_VER_DIS_CACHE Disables cache. (RO)
EFUSE_RD_CHIP_VER_PKG This is the fourth identification bit of chip packaging version among the
four identification bits. (RO)
EFUSE_RD_CHIP_VER_DIS_BT Disables Bluetooth. (RO)
EFUSE_RD_CHIP_VER_DIS_APP_CPU Disables APP CPU. (RO)
31
0 0 0 0 0 0 0
EFUSE_RD_SDIO_FORCE This field returns the value of sdio_force. (RO)
EFUSE_RD_SDIO_TIEH This field returns the value of SDIO_TIEH. (RO)
EFUSE_RD_XPD_SDIO This field returns the value of XPD_SDIO_REG. (RO)
ESFUSE_RD_CK8M_FREQ RC_FAST_CLK frequency. (RO)
Espressif Systems
Register 20.4. EFUSE_BLK0_RDATA3_REG (0x00c)
0 0 0 0 0 0 0 0 0
Register 20.5. EFUSE_BLK0_RDATA4_REG (0x010)
17 16
0 0 0 0 0 0 0 0 0
Submit Documentation Feedback
12 11 9 8
0 0 0 0 0 0 0 0 0
15 14 13 8
0 0 0 0 0 0 0 0
535
4 3 2 1 0
0 0 0 0 0 0 0 0
Reset
7 0
0 0 0 0 0 0 0 0 Reset
ESP32 TRM (Version 5.2)