.. 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_DCACHE EFUSE_BLK0 2 1 5 WR_DIS.DIS_DOWNLOAD_ICACHE EFUSE_BLK0 2 1 6 WR_DIS.DIS_DOWNLOAD_DCACHE EFUSE_BLK0 2 1 7 WR_DIS.DIS_FORCE_DOWNLOAD EFUSE_BLK0 2 1 8 WR_DIS.DIS_USB_OTG EFUSE_BLK0 2 1 9 WR_DIS.DIS_TWAI EFUSE_BLK0 2 1 10 WR_DIS.DIS_APP_CPU EFUSE_BLK0 2 1 11 WR_DIS.DIS_PAD_JTAG EFUSE_BLK0 2 1 12 WR_DIS.DIS_DOWNLOAD_MANUAL_ENCRYPT EFUSE_BLK0 2 1 13 WR_DIS.DIS_USB_JTAG EFUSE_BLK0 2 1 14 WR_DIS.DIS_USB_SERIAL_JTAG EFUSE_BLK0 2 1 15 WR_DIS.STRAP_JTAG_SEL EFUSE_BLK0 2 1 16 WR_DIS.USB_PHY_SEL EFUSE_BLK0 2 1 17 WR_DIS.VDD_SPI_XPD EFUSE_BLK0 3 1 18 WR_DIS.VDD_SPI_TIEH EFUSE_BLK0 3 1 19 WR_DIS.VDD_SPI_FORCE EFUSE_BLK0 3 1 20 WR_DIS.WDT_DELAY_SEL EFUSE_BLK0 3 1 21 WR_DIS.SPI_BOOT_CRYPT_CNT EFUSE_BLK0 4 1 22 WR_DIS.SECURE_BOOT_KEY_REVOKE0 EFUSE_BLK0 5 1 23 WR_DIS.SECURE_BOOT_KEY_REVOKE1 EFUSE_BLK0 6 1 24 WR_DIS.SECURE_BOOT_KEY_REVOKE2 EFUSE_BLK0 7 1 25 WR_DIS.KEY_PURPOSE_0 EFUSE_BLK0 8 1 26 WR_DIS.KEY_PURPOSE_1 EFUSE_BLK0 9 1 27 WR_DIS.KEY_PURPOSE_2 EFUSE_BLK0 10 1 28 WR_DIS.KEY_PURPOSE_3 EFUSE_BLK0 11 1 29 WR_DIS.KEY_PURPOSE_4 EFUSE_BLK0 12 1 30 WR_DIS.KEY_PURPOSE_5 EFUSE_BLK0 13 1 31 WR_DIS.SECURE_BOOT_EN EFUSE_BLK0 15 1 32 WR_DIS.SECURE_BOOT_AGGRESSIVE_REVOKE EFUSE_BLK0 16 1 33 WR_DIS.FLASH_TPUW EFUSE_BLK0 18 1 34 WR_DIS.DIS_DOWNLOAD_MODE EFUSE_BLK0 18 1 35 WR_DIS.DIS_DIRECT_BOOT EFUSE_BLK0 18 1 36 WR_DIS.DIS_USB_SERIAL_JTAG_ROM_PRINT EFUSE_BLK0 18 1 37 WR_DIS.FLASH_ECC_MODE EFUSE_BLK0 18 1 38 WR_DIS.DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE EFUSE_BLK0 18 1 39 WR_DIS.ENABLE_SECURITY_DOWNLOAD EFUSE_BLK0 18 1 40 WR_DIS.UART_PRINT_CONTROL EFUSE_BLK0 18 1 41 WR_DIS.PIN_POWER_SELECTION EFUSE_BLK0 18 1 42 WR_DIS.FLASH_TYPE EFUSE_BLK0 18 1 43 WR_DIS.FLASH_PAGE_SIZE EFUSE_BLK0 18 1 44 WR_DIS.FLASH_ECC_EN EFUSE_BLK0 18 1 45 WR_DIS.FORCE_SEND_RESUME EFUSE_BLK0 18 1 46 WR_DIS.SECURE_VERSION EFUSE_BLK0 18 1 47 WR_DIS.DIS_USB_OTG_DOWNLOAD_MODE EFUSE_BLK0 19 1 48 WR_DIS.DISABLE_WAFER_VERSION_MAJOR EFUSE_BLK0 19 1 49 WR_DIS.DISABLE_BLK_VERSION_MAJOR EFUSE_BLK0 19 1 50 WR_DIS.BLK1 EFUSE_BLK0 20 1 51 WR_DIS.MAC EFUSE_BLK0 20 1 52 WR_DIS.SPI_PAD_CONFIG_CLK EFUSE_BLK0 20 1 53 WR_DIS.SPI_PAD_CONFIG_Q EFUSE_BLK0 20 1 54 WR_DIS.SPI_PAD_CONFIG_D EFUSE_BLK0 20 1 55 WR_DIS.SPI_PAD_CONFIG_CS EFUSE_BLK0 20 1 56 WR_DIS.SPI_PAD_CONFIG_HD EFUSE_BLK0 20 1 57 WR_DIS.SPI_PAD_CONFIG_WP EFUSE_BLK0 20 1 58 WR_DIS.SPI_PAD_CONFIG_DQS EFUSE_BLK0 20 1 59 WR_DIS.SPI_PAD_CONFIG_D4 EFUSE_BLK0 20 1 60 WR_DIS.SPI_PAD_CONFIG_D5 EFUSE_BLK0 20 1 61 WR_DIS.SPI_PAD_CONFIG_D6 EFUSE_BLK0 20 1 62 WR_DIS.SPI_PAD_CONFIG_D7 EFUSE_BLK0 20 1 63 WR_DIS.WAFER_VERSION_MINOR_LO EFUSE_BLK0 20 1 64 WR_DIS.PKG_VERSION EFUSE_BLK0 20 1 65 WR_DIS.BLK_VERSION_MINOR EFUSE_BLK0 20 1 66 WR_DIS.K_RTC_LDO EFUSE_BLK0 20 1 67 WR_DIS.K_DIG_LDO EFUSE_BLK0 20 1 68 WR_DIS.V_RTC_DBIAS20 EFUSE_BLK0 20 1 69 WR_DIS.V_DIG_DBIAS20 EFUSE_BLK0 20 1 70 WR_DIS.DIG_DBIAS_HVT EFUSE_BLK0 20 1 71 WR_DIS.WAFER_VERSION_MINOR_HI EFUSE_BLK0 20 1 72 WR_DIS.WAFER_VERSION_MAJOR EFUSE_BLK0 20 1 73 WR_DIS.ADC2_CAL_VOL_ATTEN3 EFUSE_BLK0 20 1 74 WR_DIS.SYS_DATA_PART1 EFUSE_BLK0 21 1 75 WR_DIS.OPTIONAL_UNIQUE_ID EFUSE_BLK0 21 1 76 WR_DIS.BLK_VERSION_MAJOR EFUSE_BLK0 21 1 77 WR_DIS.TEMP_CALIB EFUSE_BLK0 21 1 78 WR_DIS.OCODE EFUSE_BLK0 21 1 79 WR_DIS.ADC1_INIT_CODE_ATTEN0 EFUSE_BLK0 21 1 80 WR_DIS.ADC1_INIT_CODE_ATTEN1 EFUSE_BLK0 21 1 81 WR_DIS.ADC1_INIT_CODE_ATTEN2 EFUSE_BLK0 21 1 82 WR_DIS.ADC1_INIT_CODE_ATTEN3 EFUSE_BLK0 21 1 83 WR_DIS.ADC2_INIT_CODE_ATTEN0 EFUSE_BLK0 21 1 84 WR_DIS.ADC2_INIT_CODE_ATTEN1 EFUSE_BLK0 21 1 85 WR_DIS.ADC2_INIT_CODE_ATTEN2 EFUSE_BLK0 21 1 86 WR_DIS.ADC2_INIT_CODE_ATTEN3 EFUSE_BLK0 21 1 87 WR_DIS.ADC1_CAL_VOL_ATTEN0 EFUSE_BLK0 21 1 88 WR_DIS.ADC1_CAL_VOL_ATTEN1 EFUSE_BLK0 21 1 89 WR_DIS.ADC1_CAL_VOL_ATTEN2 EFUSE_BLK0 21 1 90 WR_DIS.ADC1_CAL_VOL_ATTEN3 EFUSE_BLK0 21 1 91 WR_DIS.ADC2_CAL_VOL_ATTEN0 EFUSE_BLK0 21 1 92 WR_DIS.ADC2_CAL_VOL_ATTEN1 EFUSE_BLK0 21 1 93 WR_DIS.ADC2_CAL_VOL_ATTEN2 EFUSE_BLK0 21 1 94 WR_DIS.BLOCK_USR_DATA EFUSE_BLK0 22 1 95 WR_DIS.CUSTOM_MAC EFUSE_BLK0 22 1 96 WR_DIS.BLOCK_KEY0 EFUSE_BLK0 23 1 97 WR_DIS.BLOCK_KEY1 EFUSE_BLK0 24 1 98 WR_DIS.BLOCK_KEY2 EFUSE_BLK0 25 1 99 WR_DIS.BLOCK_KEY3 EFUSE_BLK0 26 1 100 WR_DIS.BLOCK_KEY4 EFUSE_BLK0 27 1 101 WR_DIS.BLOCK_KEY5 EFUSE_BLK0 28 1 102 WR_DIS.BLOCK_SYS_DATA2 EFUSE_BLK0 29 1 103 WR_DIS.USB_EXCHG_PINS EFUSE_BLK0 30 1 104 WR_DIS.USB_EXT_PHY_ENABLE EFUSE_BLK0 30 1 105 WR_DIS.SOFT_DIS_JTAG EFUSE_BLK0 31 1 106 RD_DIS EFUSE_BLK0 32 7 107 RD_DIS.BLOCK_KEY0 EFUSE_BLK0 32 1 108 RD_DIS.BLOCK_KEY1 EFUSE_BLK0 33 1 109 RD_DIS.BLOCK_KEY2 EFUSE_BLK0 34 1 110 RD_DIS.BLOCK_KEY3 EFUSE_BLK0 35 1 111 RD_DIS.BLOCK_KEY4 EFUSE_BLK0 36 1 112 RD_DIS.BLOCK_KEY5 EFUSE_BLK0 37 1 113 RD_DIS.BLOCK_SYS_DATA2 EFUSE_BLK0 38 1 114 DIS_ICACHE EFUSE_BLK0 40 1 115 DIS_DCACHE EFUSE_BLK0 41 1 116 DIS_DOWNLOAD_ICACHE EFUSE_BLK0 42 1 117 DIS_DOWNLOAD_DCACHE EFUSE_BLK0 43 1 118 DIS_FORCE_DOWNLOAD EFUSE_BLK0 44 1 119 DIS_USB_OTG EFUSE_BLK0 45 1 120 DIS_TWAI EFUSE_BLK0 46 1 121 DIS_APP_CPU EFUSE_BLK0 47 1 122 SOFT_DIS_JTAG EFUSE_BLK0 48 3 123 DIS_PAD_JTAG EFUSE_BLK0 51 1 124 DIS_DOWNLOAD_MANUAL_ENCRYPT EFUSE_BLK0 52 1 125 USB_EXCHG_PINS EFUSE_BLK0 57 1 126 USB_EXT_PHY_ENABLE EFUSE_BLK0 58 1 127 VDD_SPI_XPD EFUSE_BLK0 68 1 128 VDD_SPI_TIEH EFUSE_BLK0 69 1 129 VDD_SPI_FORCE EFUSE_BLK0 70 1 130 WDT_DELAY_SEL EFUSE_BLK0 80 2 131 SPI_BOOT_CRYPT_CNT EFUSE_BLK0 82 3 132 SECURE_BOOT_KEY_REVOKE0 EFUSE_BLK0 85 1 133 SECURE_BOOT_KEY_REVOKE1 EFUSE_BLK0 86 1 134 SECURE_BOOT_KEY_REVOKE2 EFUSE_BLK0 87 1 135 KEY_PURPOSE_0 EFUSE_BLK0 88 4 136 KEY_PURPOSE_1 EFUSE_BLK0 92 4 137 KEY_PURPOSE_2 EFUSE_BLK0 96 4 138 KEY_PURPOSE_3 EFUSE_BLK0 100 4 139 KEY_PURPOSE_4 EFUSE_BLK0 104 4 140 KEY_PURPOSE_5 EFUSE_BLK0 108 4 141 SECURE_BOOT_EN EFUSE_BLK0 116 1 142 SECURE_BOOT_AGGRESSIVE_REVOKE EFUSE_BLK0 117 1 143 DIS_USB_JTAG EFUSE_BLK0 118 1 144 DIS_USB_SERIAL_JTAG EFUSE_BLK0 119 1 145 STRAP_JTAG_SEL EFUSE_BLK0 120 1 146 USB_PHY_SEL EFUSE_BLK0 121 1 147 FLASH_TPUW EFUSE_BLK0 124 4 148 DIS_DOWNLOAD_MODE EFUSE_BLK0 128 1 149 DIS_DIRECT_BOOT EFUSE_BLK0 129 1 150 DIS_USB_SERIAL_JTAG_ROM_PRINT EFUSE_BLK0 130 1 151 FLASH_ECC_MODE EFUSE_BLK0 131 1 152 DIS_USB_SERIAL_JTAG_DOWNLOAD_MODE EFUSE_BLK0 132 1 153 ENABLE_SECURITY_DOWNLOAD EFUSE_BLK0 133 1 154 UART_PRINT_CONTROL EFUSE_BLK0 134 2 155 PIN_POWER_SELECTION EFUSE_BLK0 136 1 156 FLASH_TYPE EFUSE_BLK0 137 1 157 FLASH_PAGE_SIZE EFUSE_BLK0 138 2 158 FLASH_ECC_EN EFUSE_BLK0 140 1 159 FORCE_SEND_RESUME EFUSE_BLK0 141 1 160 SECURE_VERSION EFUSE_BLK0 142 16 161 DIS_USB_OTG_DOWNLOAD_MODE EFUSE_BLK0 159 1 162 DISABLE_WAFER_VERSION_MAJOR EFUSE_BLK0 160 1 163 DISABLE_BLK_VERSION_MAJOR EFUSE_BLK0 161 1 164 MAC EFUSE_BLK1 0 8 165 MAC EFUSE_BLK1 8 8 166 MAC EFUSE_BLK1 16 8 167 MAC EFUSE_BLK1 24 8 168 MAC EFUSE_BLK1 32 8 169 MAC EFUSE_BLK1 40 8 170 SPI_PAD_CONFIG_CLK EFUSE_BLK1 48 6 171 SPI_PAD_CONFIG_Q EFUSE_BLK1 54 6 172 SPI_PAD_CONFIG_D EFUSE_BLK1 60 6 173 SPI_PAD_CONFIG_CS EFUSE_BLK1 66 6 174 SPI_PAD_CONFIG_HD EFUSE_BLK1 72 6 175 SPI_PAD_CONFIG_WP EFUSE_BLK1 78 6 176 SPI_PAD_CONFIG_DQS EFUSE_BLK1 84 6 177 SPI_PAD_CONFIG_D4 EFUSE_BLK1 90 6 178 SPI_PAD_CONFIG_D5 EFUSE_BLK1 96 6 179 SPI_PAD_CONFIG_D6 EFUSE_BLK1 102 6 180 SPI_PAD_CONFIG_D7 EFUSE_BLK1 108 6 181 WAFER_VERSION_MINOR_LO EFUSE_BLK1 114 3 182 PKG_VERSION EFUSE_BLK1 117 3 183 BLK_VERSION_MINOR EFUSE_BLK1 120 3 184 K_RTC_LDO EFUSE_BLK1 141 7 185 K_DIG_LDO EFUSE_BLK1 148 7 186 V_RTC_DBIAS20 EFUSE_BLK1 155 8 187 V_DIG_DBIAS20 EFUSE_BLK1 163 8 188 DIG_DBIAS_HVT EFUSE_BLK1 171 5 189 WAFER_VERSION_MINOR_HI EFUSE_BLK1 183 1 190 WAFER_VERSION_MAJOR EFUSE_BLK1 184 2 191 ADC2_CAL_VOL_ATTEN3 EFUSE_BLK1 186 6 192 SYS_DATA_PART2 EFUSE_BLK10 0 256 193 OPTIONAL_UNIQUE_ID EFUSE_BLK2 0 128 194 BLK_VERSION_MAJOR EFUSE_BLK2 128 2 195 TEMP_CALIB EFUSE_BLK2 132 9 196 OCODE EFUSE_BLK2 141 8 197 ADC1_INIT_CODE_ATTEN0 EFUSE_BLK2 149 8 198 ADC1_INIT_CODE_ATTEN1 EFUSE_BLK2 157 6 199 ADC1_INIT_CODE_ATTEN2 EFUSE_BLK2 163 6 200 ADC1_INIT_CODE_ATTEN3 EFUSE_BLK2 169 6 201 ADC2_INIT_CODE_ATTEN0 EFUSE_BLK2 175 8 202 ADC2_INIT_CODE_ATTEN1 EFUSE_BLK2 183 6 203 ADC2_INIT_CODE_ATTEN2 EFUSE_BLK2 189 6 204 ADC2_INIT_CODE_ATTEN3 EFUSE_BLK2 195 6 205 ADC1_CAL_VOL_ATTEN0 EFUSE_BLK2 201 8 206 ADC1_CAL_VOL_ATTEN1 EFUSE_BLK2 209 8 207 ADC1_CAL_VOL_ATTEN2 EFUSE_BLK2 217 8 208 ADC1_CAL_VOL_ATTEN3 EFUSE_BLK2 225 8 209 ADC2_CAL_VOL_ATTEN0 EFUSE_BLK2 233 8 210 ADC2_CAL_VOL_ATTEN1 EFUSE_BLK2 241 7 211 ADC2_CAL_VOL_ATTEN2 EFUSE_BLK2 248 7 212 USER_DATA EFUSE_BLK3 0 256 213 USER_DATA.MAC_CUSTOM EFUSE_BLK3 200 48 214 KEY0 EFUSE_BLK4 0 256 215 KEY1 EFUSE_BLK5 0 256 216 KEY2 EFUSE_BLK6 0 256 217 KEY3 EFUSE_BLK7 0 256 218 KEY4 EFUSE_BLK8 0 256 219 KEY5 EFUSE_BLK9 0 256 Used bits in efuse table: EFUSE_BLK0 [0 31] [0 0] [2 2] ... [22 30] [30 38] [32 38] [40 52] [57 58] [68 70] [80 111] [116 121] [124 157] [159 161] EFUSE_BLK1 [0 122] [141 175] [183 191] EFUSE_BLK10 [0 255] EFUSE_BLK2 [0 129] [132 254] 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)