Espressif ESP32 Technical Reference Manual page 524

20 eFuse Controller
Name
SPI_pad_config_clk
SPI_pad_config_q
SPI_pad_config_d
SPI_pad_config_cs0
flash_crypt_config
coding_scheme*
console_debug_disable 1
abstract_done_0
abstract_done_1
JTAG_disable
download_dis_encrypt
download_dis_decrypt
download_dis_cache
key_status
BLOCK1*
BLOCK2*
BLOCK3*
disable_app_cpu
disable_bt
pkg_version
disable_cache
CK8M Frequency
Espressif Systems
Program
Bit width -Protection by
efuse_wr_disable efuse_rd_disable
5 6
5 6
5 6
5 6
4 10
2 10
15
1 12
1 13
1 14
1 15
1 15
1 15
1 10
256/192/128 7
256/192/128 8
256/192/128 9
1 3
1 3
4 3
1 3
8 4
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Software-Read
-Protection by
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3
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3
0
1
2
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Description
configures the SPI I/O to a
certain pad
configures the SPI I/O to a
certain pad
configures the SPI I/O to a
certain pad
configures the SPI I/O to a
certain pad
governs flash encryption/
decryption
controls the eFuse Controller
disables the ROM BASIC
debug console fallback
mode when set to 1
determines the status of
Secure Boot
determines the status of
Secure Boot
disables access to the
JTAG controllers so as to
effectively disable external
use of JTAG
governs flash encryption/
decryption
governs flash encryption/
decryption
disables cache when boot
mode is the Download Mode
determines whether BLOCK3
is deployed for user purposes
governs flash encryption/
decryption
key for Secure Boot
key for user purposes
disables APP CPU
disables Bluetooth
packaging version
disables cache
RC_FAST_CLK frequency
ESP32 TRM (Version 5.2)