esp-idf/docs/en/api-reference/system/inc/espefuse_summary_ESP32-C2.rst

.. code-block:: none

    idf.py efuse-summary

    Executing action: efuse-summary
    (...)

    EFUSE_NAME (Block) Description  = [Meaningful Value] [Readable/Writeable] (Hex Value)
    ----------------------------------------------------------------------------------------
    Calibration fuses:
    OCODE (BLOCK2)                                     OCode                                              = 78 R/W (0b1001110)
    TEMP_CALIB (BLOCK2)                                Temperature calibration data                       = -7.4 R/W (0b101001010)
    ADC1_INIT_CODE_ATTEN0 (BLOCK2)                     ADC1 init code at atten0                           = 28 R/W (0x07)
    ADC1_INIT_CODE_ATTEN3 (BLOCK2)                     ADC1 init code at atten3                           = 0 R/W (0b10000)
    ADC1_CAL_VOL_ATTEN0 (BLOCK2)                       ADC1 calibration voltage at atten0                 = -44 R/W (0x8b)
    ADC1_CAL_VOL_ATTEN3 (BLOCK2)                       ADC1 calibration voltage at atten3                 = 16 R/W (0b000100)
    DIG_DBIAS_HVT (BLOCK2)                             BLOCK2 digital dbias when hvt                      = -16 R/W (0b10100)
    DIG_LDO_SLP_DBIAS2 (BLOCK2)                        BLOCK2 DIG_LDO_DBG0_DBIAS2                         = -8 R/W (0b1000010)
    DIG_LDO_SLP_DBIAS26 (BLOCK2)                       BLOCK2 DIG_LDO_DBG0_DBIAS26                        = 24 R/W (0x06)
    DIG_LDO_ACT_DBIAS26 (BLOCK2)                       BLOCK2 DIG_LDO_ACT_DBIAS26                         = 16 R/W (0b000100)
    DIG_LDO_ACT_STEPD10 (BLOCK2)                       BLOCK2 DIG_LDO_ACT_STEPD10                         = 12 R/W (0x3)
    RTC_LDO_SLP_DBIAS13 (BLOCK2)                       BLOCK2 DIG_LDO_SLP_DBIAS13                         = 88 R/W (0b0010110)
    RTC_LDO_SLP_DBIAS29 (BLOCK2)                       BLOCK2 DIG_LDO_SLP_DBIAS29                         = 96 R/W (0b000011000)
    RTC_LDO_SLP_DBIAS31 (BLOCK2)                       BLOCK2 DIG_LDO_SLP_DBIAS31                         = 4 R/W (0b000001)
    RTC_LDO_ACT_DBIAS31 (BLOCK2)                       BLOCK2 DIG_LDO_ACT_DBIAS31                         = 24 R/W (0b000110)
    RTC_LDO_ACT_DBIAS13 (BLOCK2)                       BLOCK2 DIG_LDO_ACT_DBIAS13                         = 72 R/W (0x12)

    Config fuses:
    WR_DIS (BLOCK0)                                    Disable programming of individual eFuses           = 0 R/W (0x00)
    RD_DIS (BLOCK0)                                    Disable reading from BlOCK3                        = 0 R/W (0b00)
    UART_PRINT_CONTROL (BLOCK0)                        Set the default UARTboot message output mode       = Enable R/W (0b00)
    DIS_DIRECT_BOOT (BLOCK0)                           This bit set means disable direct_boot mode        = False R/W (0b0)

    Flash fuses:
    FORCE_SEND_RESUME (BLOCK0)                         Set this bit to force ROM code to send a resume co = False R/W (0b0)
                                                       mmand during SPI boot
    FLASH_TPUW (BLOCK0)                                Configures flash waiting time after power-up; in u = 0 R/W (0x0)
                                                       nit of ms. If the value is less than 15; the waiti
                                                       ng time is the configurable value.  Otherwise; the
                                                        waiting time is twice the configurable value

    Identity fuses:
    DISABLE_WAFER_VERSION_MAJOR (BLOCK0)               Disables check of wafer version major              = False R/W (0b0)
    DISABLE_BLK_VERSION_MAJOR (BLOCK0)                 Disables check of blk version major                = False R/W (0b0)
    WAFER_VERSION_MINOR (BLOCK2)                       WAFER_VERSION_MINOR                                = 2 R/W (0x2)
    WAFER_VERSION_MAJOR (BLOCK2)                       WAFER_VERSION_MAJOR                                = 1 R/W (0b01)
    PKG_VERSION (BLOCK2)                               EFUSE_PKG_VERSION                                  = 1 R/W (0b001)
    BLK_VERSION_MINOR (BLOCK2)                         Minor version of BLOCK2                            = With calib R/W (0b001)
    BLK_VERSION_MAJOR (BLOCK2)                         Major version of BLOCK2                            = 0 R/W (0b00)

    Jtag fuses:
    DIS_PAD_JTAG (BLOCK0)                              Set this bit to disable pad jtag                   = False R/W (0b0)

    Mac fuses:
    CUSTOM_MAC_USED (BLOCK0)                           True if MAC_CUSTOM is burned                       = False R/W (0b0)
    CUSTOM_MAC (BLOCK1)                                Custom MAC address
       = 00:00:00:00:00:00 (OK) R/W
    MAC (BLOCK2)                                       MAC address
       = 08:3a:8d:5c:4b:94 (OK) R/W

    Security fuses:
    DIS_DOWNLOAD_ICACHE (BLOCK0)                       The bit be set to disable icache in download mode  = False R/W (0b0)
    DIS_DOWNLOAD_MANUAL_ENCRYPT (BLOCK0)               The bit be set to disable manual encryption        = False R/W (0b0)
    SPI_BOOT_CRYPT_CNT (BLOCK0)                        Enables flash encryption when 1 or 3 bits are set  = Disable R/W (0b000)
                                                       and disables otherwise
    XTS_KEY_LENGTH_256 (BLOCK0)                        Flash encryption key length                        = 128 bits key R/W (0b0)
    DIS_DOWNLOAD_MODE (BLOCK0)                         Set this bit to disable download mode (boot_mode[3 = False R/W (0b0)
                                                       :0] = 0; 1; 2; 4; 5; 6; 7)
    ENABLE_SECURITY_DOWNLOAD (BLOCK0)                  Set this bit to enable secure UART download mode   = False R/W (0b0)
    SECURE_BOOT_EN (BLOCK0)                            The bit be set to enable secure boot               = False R/W (0b0)
    SECURE_VERSION (BLOCK0)                            Secure version for anti-rollback                   = 0 R/W (0x0)
    BLOCK_KEY0 (BLOCK3)                                BLOCK_KEY0 - 256-bits. 256-bit key of Flash Encryp
       = 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
                                                       tion
    BLOCK_KEY0_LOW_128 (BLOCK3)                        BLOCK_KEY0 - lower 128-bits. 128-bit key of Flash
       = 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
                                                       Encryption
    BLOCK_KEY0_HI_128 (BLOCK3)                         BLOCK_KEY0 - higher 128-bits. 128-bits key of Secu
       = 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
                                                       re Boot

    Wdt fuses:
    WDT_DELAY_SEL (BLOCK0)                             RTC watchdog timeout threshold; in unit of slow cl = 40000 R/W (0b00)
                                                       ock cycle


To get a dump for all eFuse registers.

.. code-block:: none

    idf.py efuse-dump

    Executing action: efuse-dump
    Running espefuse.py in directory <project-directory>
    Executing "espefuse.py dump --chip esp32c2"...
    espefuse.py v4.6-dev
    Connecting....
    BLOCK0          (BLOCK0          ) [0 ] read_regs: 00000000 00000000
    BLOCK1          (BLOCK1          ) [1 ] read_regs: 00000000 00000000 00000000
    BLOCK2          (BLOCK2          ) [2 ] read_regs: 8d5c4b94 8252083a 5c01e953 80d0a824 c0860b18 00006890 00000000 4b000000
    BLOCK_KEY0      (BLOCK3          ) [3 ] read_regs: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

    BLOCK0          (BLOCK0          ) [0 ] err__regs: 00000000 00000000
    EFUSE_RD_RS_ERR_REG         0x00000000

    === Run "dump" command ===