Espressif ESP32-S2 - Page 823

Chapter 2. API Reference
(continued from previous page)
DIS_USB_DOWNLOAD_MODE (BLOCK0) Disables use of USB in UART␣
,→download boot mode = False R/W (0b0)
UART_PRINT_CONTROL (BLOCK0) Sets the default UART boot␣
,→message output mode = Enabled R/W (0b00)
FLASH_TYPE (BLOCK0) Selects SPI flash type ␣
,→ = 4 data lines R/W (0b0)
FORCE_SEND_RESUME (BLOCK0) Forces ROM code to send an SPI␣
,→flash resume comman = False R/W (0b0)
d during SPI boot
BLOCK_USR_DATA (BLOCK3) User data
= 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
Efuse fuses:
WR_DIS (BLOCK0) Disables programming of␣
,→individual eFuses = 0 R/W (0x00000000)
RD_DIS (BLOCK0) Disables software reading from␣
,→BLOCK4-10 = 0 R/W (0b0000000)
Identity fuses:
BLOCK0_VERSION (BLOCK0) BLOCK0 efuse version ␣
,→ = 0 R/W (0b00)
SECURE_VERSION (BLOCK0) Secure version (used by ESP-IDF␣
,→anti-rollback feat = 0 R/W (0x0000)
ure)
MAC (BLOCK1) Factory MAC Address
= 7c:df:a1:00:3a:6e: (OK) R/W
WAFER_VERSION (BLOCK1) WAFER version ␣
,→ = A R/W (0b000)
PKG_VERSION (BLOCK1) Package version
= ESP32-S2, QFN 7x7 56 pins R/W (0x0)
BLOCK1_VERSION (BLOCK1) BLOCK1 efuse version ␣
,→ = 0 R/W (0b000)
OPTIONAL_UNIQUE_ID (BLOCK2)(0 errors): Optional unique 128-bit ID
= 7d 33 b8 bb 0b 13 b3 c8 71 37 0e e8 7c ab d5 92 R/W
BLOCK2_VERSION (BLOCK2) Version of BLOCK2 ␣
,→ = With calibration R/W (0b001)
CUSTOM_MAC (BLOCK3) Custom MAC Address
= 00:00:00:00:00:00 (OK) R/W
Security fuses:
SOFT_DIS_JTAG (BLOCK0) Software disables JTAG. When␣
,→software disabled, JT = False R/W (0b0)
AG can be activated temporarily␣
,→by HMAC peripheral
HARD_DIS_JTAG (BLOCK0) Hardware disables JTAG␣
,→permanently = False R/W (0b0)
DIS_DOWNLOAD_MANUAL_ENCRYPT (BLOCK0) Disables flash encryption when␣
,→in download boot mo = False R/W (0b0)
des
SPI_BOOT_CRYPT_CNT (BLOCK0) Enables encryption and␣
,→decryption, when an SPI boo = Disable R/W (0b000)
t mode is set. Enabled when 1 or␣
,→3 bits are set,di
sabled otherwise
SECURE_BOOT_KEY_REVOKE0 (BLOCK0) If set, revokes use of secure␣
,→boot key digest 0 = False R/W (0b0)
SECURE_BOOT_KEY_REVOKE1 (BLOCK0) If set, revokes use of secure␣
,→boot key digest 1 = False R/W (0b0)
SECURE_BOOT_KEY_REVOKE2 (BLOCK0) If set, revokes use of secure␣
,→boot key digest 2 = False R/W (0b0)
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