.. code-block:: none $ ./efuse_table_gen.py {IDF_TARGET_PATH_NAME}/esp_efuse_table.csv --info Max number of bits in BLK 256 Sorted efuse table: # field_name efuse_block bit_start bit_count 1 WR_DIS EFUSE_BLK0 0 32 2 WR_DIS.RD_DIS EFUSE_BLK0 0 1 3 WR_DIS.DIS_ICACHE EFUSE_BLK0 2 1 4 WR_DIS.DIS_USB_JTAG EFUSE_BLK0 2 1 5 WR_DIS.DIS_DOWNLOAD_ICACHE EFUSE_BLK0 2 1 6 WR_DIS.DIS_USB_SERIAL_JTAG EFUSE_BLK0 2 1 7 WR_DIS.DIS_FORCE_DOWNLOAD EFUSE_BLK0 2 1 8 WR_DIS.DIS_TWAI EFUSE_BLK0 2 1 9 WR_DIS.JTAG_SEL_ENABLE EFUSE_BLK0 2 1 10 WR_DIS.DIS_PAD_JTAG EFUSE_BLK0 2 1 11 WR_DIS.DIS_DOWNLOAD_MANUAL_ENCRYPT EFUSE_BLK0 2 1 12 WR_DIS.WDT_DELAY_SEL EFUSE_BLK0 3 1 13 WR_DIS.SPI_BOOT_CRYPT_CNT EFUSE_BLK0 4 1 14 WR_DIS.SECURE_BOOT_KEY_REVOKE0 EFUSE_BLK0 5 1 15 WR_DIS.SECURE_BOOT_KEY_REVOKE1 EFUSE_BLK0 6 1 16 WR_DIS.SECURE_BOOT_KEY_REVOKE2 EFUSE_BLK0 7 1 17 WR_DIS.KEY_PURPOSE_0 EFUSE_BLK0 8 1 18 WR_DIS.KEY_PURPOSE_1 EFUSE_BLK0 9 1 19 WR_DIS.KEY_PURPOSE_2 EFUSE_BLK0 10 1 20 WR_DIS.KEY_PURPOSE_3 EFUSE_BLK0 11 1 21 WR_DIS.KEY_PURPOSE_4 EFUSE_BLK0 12 1 22 WR_DIS.KEY_PURPOSE_5 EFUSE_BLK0 13 1 23 WR_DIS.SECURE_BOOT_EN EFUSE_BLK0 15 1 24 WR_DIS.SECURE_BOOT_AGGRESSIVE_REVOKE EFUSE_BLK0 16 1 25 WR_DIS.FLASH_TPUW EFUSE_BLK0 18 1 26 WR_DIS.DIS_DOWNLOAD_MODE EFUSE_BLK0 18 1 27 WR_DIS.DIS_DIRECT_BOOT EFUSE_BLK0 18 1 28 WR_DIS.DIS_USB_SERIAL_JTAG_ROM_PRINT EFUSE_BLK0 18 1 29 WR_DIS.DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE EFUSE_BLK0 18 1 30 WR_DIS.ENABLE_SECURITY_DOWNLOAD EFUSE_BLK0 18 1 31 WR_DIS.UART_PRINT_CONTROL EFUSE_BLK0 18 1 32 WR_DIS.FORCE_SEND_RESUME EFUSE_BLK0 18 1 33 WR_DIS.SECURE_VERSION EFUSE_BLK0 18 1 34 WR_DIS.ERR_RST_ENABLE EFUSE_BLK0 19 1 35 WR_DIS.DISABLE_WAFER_VERSION_MAJOR EFUSE_BLK0 19 1 36 WR_DIS.DISABLE_BLK_VERSION_MAJOR EFUSE_BLK0 19 1 37 WR_DIS.BLK1 EFUSE_BLK0 20 1 38 WR_DIS.MAC EFUSE_BLK0 20 1 39 WR_DIS.SPI_PAD_CONFIG_CLK EFUSE_BLK0 20 1 40 WR_DIS.SPI_PAD_CONFIG_Q EFUSE_BLK0 20 1 41 WR_DIS.SPI_PAD_CONFIG_D EFUSE_BLK0 20 1 42 WR_DIS.SPI_PAD_CONFIG_CS EFUSE_BLK0 20 1 43 WR_DIS.SPI_PAD_CONFIG_HD EFUSE_BLK0 20 1 44 WR_DIS.SPI_PAD_CONFIG_WP EFUSE_BLK0 20 1 45 WR_DIS.SPI_PAD_CONFIG_DQS EFUSE_BLK0 20 1 46 WR_DIS.SPI_PAD_CONFIG_D4 EFUSE_BLK0 20 1 47 WR_DIS.SPI_PAD_CONFIG_D5 EFUSE_BLK0 20 1 48 WR_DIS.SPI_PAD_CONFIG_D6 EFUSE_BLK0 20 1 49 WR_DIS.SPI_PAD_CONFIG_D7 EFUSE_BLK0 20 1 50 WR_DIS.WAFER_VERSION_MINOR_LO EFUSE_BLK0 20 1 51 WR_DIS.PKG_VERSION EFUSE_BLK0 20 1 52 WR_DIS.BLK_VERSION_MINOR EFUSE_BLK0 20 1 53 WR_DIS.K_RTC_LDO EFUSE_BLK0 20 1 54 WR_DIS.K_DIG_LDO EFUSE_BLK0 20 1 55 WR_DIS.V_RTC_DBIAS20 EFUSE_BLK0 20 1 56 WR_DIS.V_DIG_DBIAS20 EFUSE_BLK0 20 1 57 WR_DIS.DIG_DBIAS_HVT EFUSE_BLK0 20 1 58 WR_DIS.THRES_HVT EFUSE_BLK0 20 1 59 WR_DIS.WAFER_VERSION_MINOR_HI EFUSE_BLK0 20 1 60 WR_DIS.WAFER_VERSION_MAJOR EFUSE_BLK0 20 1 61 WR_DIS.SYS_DATA_PART1 EFUSE_BLK0 21 1 62 WR_DIS.OPTIONAL_UNIQUE_ID EFUSE_BLK0 21 1 63 WR_DIS.BLK_VERSION_MAJOR EFUSE_BLK0 21 1 64 WR_DIS.TEMP_CALIB EFUSE_BLK0 21 1 65 WR_DIS.OCODE EFUSE_BLK0 21 1 66 WR_DIS.ADC1_INIT_CODE_ATTEN0 EFUSE_BLK0 21 1 67 WR_DIS.ADC1_INIT_CODE_ATTEN1 EFUSE_BLK0 21 1 68 WR_DIS.ADC1_INIT_CODE_ATTEN2 EFUSE_BLK0 21 1 69 WR_DIS.ADC1_INIT_CODE_ATTEN3 EFUSE_BLK0 21 1 70 WR_DIS.ADC1_CAL_VOL_ATTEN0 EFUSE_BLK0 21 1 71 WR_DIS.ADC1_CAL_VOL_ATTEN1 EFUSE_BLK0 21 1 72 WR_DIS.ADC1_CAL_VOL_ATTEN2 EFUSE_BLK0 21 1 73 WR_DIS.ADC1_CAL_VOL_ATTEN3 EFUSE_BLK0 21 1 74 WR_DIS.BLOCK_USR_DATA EFUSE_BLK0 22 1 75 WR_DIS.CUSTOM_MAC EFUSE_BLK0 22 1 76 WR_DIS.BLOCK_KEY0 EFUSE_BLK0 23 1 77 WR_DIS.BLOCK_KEY1 EFUSE_BLK0 24 1 78 WR_DIS.BLOCK_KEY2 EFUSE_BLK0 25 1 79 WR_DIS.BLOCK_KEY3 EFUSE_BLK0 26 1 80 WR_DIS.BLOCK_KEY4 EFUSE_BLK0 27 1 81 WR_DIS.BLOCK_KEY5 EFUSE_BLK0 28 1 82 WR_DIS.BLOCK_SYS_DATA2 EFUSE_BLK0 29 1 83 WR_DIS.USB_EXCHG_PINS EFUSE_BLK0 30 1 84 WR_DIS.VDD_SPI_AS_GPIO EFUSE_BLK0 30 1 85 WR_DIS.SOFT_DIS_JTAG EFUSE_BLK0 31 1 86 RD_DIS EFUSE_BLK0 32 7 87 RD_DIS.BLOCK_KEY0 EFUSE_BLK0 32 1 88 RD_DIS.BLOCK_KEY1 EFUSE_BLK0 33 1 89 RD_DIS.BLOCK_KEY2 EFUSE_BLK0 34 1 90 RD_DIS.BLOCK_KEY3 EFUSE_BLK0 35 1 91 RD_DIS.BLOCK_KEY4 EFUSE_BLK0 36 1 92 RD_DIS.BLOCK_KEY5 EFUSE_BLK0 37 1 93 RD_DIS.BLOCK_SYS_DATA2 EFUSE_BLK0 38 1 94 DIS_ICACHE EFUSE_BLK0 40 1 95 DIS_USB_JTAG EFUSE_BLK0 41 1 96 DIS_DOWNLOAD_ICACHE EFUSE_BLK0 42 1 97 DIS_USB_SERIAL_JTAG EFUSE_BLK0 43 1 98 DIS_FORCE_DOWNLOAD EFUSE_BLK0 44 1 99 DIS_TWAI EFUSE_BLK0 46 1 100 JTAG_SEL_ENABLE EFUSE_BLK0 47 1 101 SOFT_DIS_JTAG EFUSE_BLK0 48 3 102 DIS_PAD_JTAG EFUSE_BLK0 51 1 103 DIS_DOWNLOAD_MANUAL_ENCRYPT EFUSE_BLK0 52 1 104 USB_EXCHG_PINS EFUSE_BLK0 57 1 105 VDD_SPI_AS_GPIO EFUSE_BLK0 58 1 106 WDT_DELAY_SEL EFUSE_BLK0 80 2 107 SPI_BOOT_CRYPT_CNT EFUSE_BLK0 82 3 108 SECURE_BOOT_KEY_REVOKE0 EFUSE_BLK0 85 1 109 SECURE_BOOT_KEY_REVOKE1 EFUSE_BLK0 86 1 110 SECURE_BOOT_KEY_REVOKE2 EFUSE_BLK0 87 1 111 KEY_PURPOSE_0 EFUSE_BLK0 88 4 112 KEY_PURPOSE_1 EFUSE_BLK0 92 4 113 KEY_PURPOSE_2 EFUSE_BLK0 96 4 114 KEY_PURPOSE_3 EFUSE_BLK0 100 4 115 KEY_PURPOSE_4 EFUSE_BLK0 104 4 116 KEY_PURPOSE_5 EFUSE_BLK0 108 4 117 SECURE_BOOT_EN EFUSE_BLK0 116 1 118 SECURE_BOOT_AGGRESSIVE_REVOKE EFUSE_BLK0 117 1 119 FLASH_TPUW EFUSE_BLK0 124 4 120 DIS_DOWNLOAD_MODE EFUSE_BLK0 128 1 121 DIS_DIRECT_BOOT EFUSE_BLK0 129 1 122 DIS_USB_SERIAL_JTAG_ROM_PRINT EFUSE_BLK0 130 1 123 DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE EFUSE_BLK0 132 1 124 ENABLE_SECURITY_DOWNLOAD EFUSE_BLK0 133 1 125 UART_PRINT_CONTROL EFUSE_BLK0 134 2 126 FORCE_SEND_RESUME EFUSE_BLK0 141 1 127 SECURE_VERSION EFUSE_BLK0 142 16 128 ERR_RST_ENABLE EFUSE_BLK0 159 1 129 DISABLE_WAFER_VERSION_MAJOR EFUSE_BLK0 160 1 130 DISABLE_BLK_VERSION_MAJOR EFUSE_BLK0 161 1 131 MAC EFUSE_BLK1 0 8 132 MAC EFUSE_BLK1 8 8 133 MAC EFUSE_BLK1 16 8 134 MAC EFUSE_BLK1 24 8 135 MAC EFUSE_BLK1 32 8 136 MAC EFUSE_BLK1 40 8 137 SPI_PAD_CONFIG_CLK EFUSE_BLK1 48 6 138 SPI_PAD_CONFIG_Q EFUSE_BLK1 54 6 139 SPI_PAD_CONFIG_D EFUSE_BLK1 60 6 140 SPI_PAD_CONFIG_CS EFUSE_BLK1 66 6 141 SPI_PAD_CONFIG_HD EFUSE_BLK1 72 6 142 SPI_PAD_CONFIG_WP EFUSE_BLK1 78 6 143 SPI_PAD_CONFIG_DQS EFUSE_BLK1 84 6 144 SPI_PAD_CONFIG_D4 EFUSE_BLK1 90 6 145 SPI_PAD_CONFIG_D5 EFUSE_BLK1 96 6 146 SPI_PAD_CONFIG_D6 EFUSE_BLK1 102 6 147 SPI_PAD_CONFIG_D7 EFUSE_BLK1 108 6 148 WAFER_VERSION_MINOR_LO EFUSE_BLK1 114 3 149 PKG_VERSION EFUSE_BLK1 117 3 150 BLK_VERSION_MINOR EFUSE_BLK1 120 3 151 K_RTC_LDO EFUSE_BLK1 135 7 152 K_DIG_LDO EFUSE_BLK1 142 7 153 V_RTC_DBIAS20 EFUSE_BLK1 149 8 154 V_DIG_DBIAS20 EFUSE_BLK1 157 8 155 DIG_DBIAS_HVT EFUSE_BLK1 165 5 156 THRES_HVT EFUSE_BLK1 170 10 157 WAFER_VERSION_MINOR_HI EFUSE_BLK1 183 1 158 WAFER_VERSION_MAJOR EFUSE_BLK1 184 2 159 SYS_DATA_PART2 EFUSE_BLK10 0 256 160 OPTIONAL_UNIQUE_ID EFUSE_BLK2 0 128 161 BLK_VERSION_MAJOR EFUSE_BLK2 128 2 162 TEMP_CALIB EFUSE_BLK2 131 9 163 OCODE EFUSE_BLK2 140 8 164 ADC1_INIT_CODE_ATTEN0 EFUSE_BLK2 148 10 165 ADC1_INIT_CODE_ATTEN1 EFUSE_BLK2 158 10 166 ADC1_INIT_CODE_ATTEN2 EFUSE_BLK2 168 10 167 ADC1_INIT_CODE_ATTEN3 EFUSE_BLK2 178 10 168 ADC1_CAL_VOL_ATTEN0 EFUSE_BLK2 188 10 169 ADC1_CAL_VOL_ATTEN1 EFUSE_BLK2 198 10 170 ADC1_CAL_VOL_ATTEN2 EFUSE_BLK2 208 10 171 ADC1_CAL_VOL_ATTEN3 EFUSE_BLK2 218 10 172 USER_DATA EFUSE_BLK3 0 256 173 USER_DATA.MAC_CUSTOM EFUSE_BLK3 200 48 174 KEY0 EFUSE_BLK4 0 256 175 KEY1 EFUSE_BLK5 0 256 176 KEY2 EFUSE_BLK6 0 256 177 KEY3 EFUSE_BLK7 0 256 178 KEY4 EFUSE_BLK8 0 256 179 KEY5 EFUSE_BLK9 0 256 Used bits in efuse table: EFUSE_BLK0 [0 31] [0 0] [2 2] ... [40 44] [46 52] [57 58] [80 111] [116 117] [124 130] [132 135] [141 157] [159 161] EFUSE_BLK1 [0 122] [135 179] [183 185] EFUSE_BLK10 [0 255] EFUSE_BLK2 [0 129] [131 227] EFUSE_BLK3 [0 255] [200 247] EFUSE_BLK4 [0 255] EFUSE_BLK5 [0 255] EFUSE_BLK6 [0 255] EFUSE_BLK7 [0 255] EFUSE_BLK8 [0 255] EFUSE_BLK9 [0 255] Note: Not printed ranges are free for using. (bits in EFUSE_BLK0 are reserved for Espressif)