Chapter 2. API Reference
(continued from previous page)
SPI_PAD_CONFIG_CS (BLOCK1) SPI CS pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_HD (BLOCK1) SPI HD (D3) pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_WP (BLOCK1) SPI WP (D2) pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_DQS (BLOCK1) SPI DQS pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_D4 (BLOCK1) SPI D4 pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_D5 (BLOCK1) SPI D5 pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_D6 (BLOCK1) SPI D6 pad ␣
,→ = 0 R/W (0b000000)
SPI_PAD_CONFIG_D7 (BLOCK1) SPI D7 pad ␣
,→ = 0 R/W (0b000000)
Usb Config fuses:
DIS_USB (BLOCK0) Disables the USB OTG hardware ␣
,→ = False R/W (0b0)
USB_EXCHG_PINS (BLOCK0) Exchanges USB D+ and D- pins ␣
,→ = False R/W (0b0)
EXT_PHY_ENABLE (BLOCK0) Enables external USB PHY ␣
,→ = False R/W (0b0)
USB_FORCE_NOPERSIST (BLOCK0) Forces to set USB BVALID to 1 ␣
,→ = False R/W (0b0)
Vdd_Spi Config fuses:
VDD_SPI_FORCE (BLOCK0) Force using VDD_SPI_XPD and VDD_
,→SPI_TIEH to config = False R/W (0b0)
ure VDD_SPI LDO
VDD_SPI_XPD (BLOCK0) The VDD_SPI regulator is powered␣
,→on = False R/W (0b0)
VDD_SPI_TIEH (BLOCK0) The VDD_SPI power supply voltage␣
,→at reset = Connect to 1.8V LDO R/W (0b0)
PIN_POWER_SELECTION (BLOCK0) Sets default power supply for␣
,→GPIO33..37, set when = VDD3P3_CPU R/W (0b0)
SPI flash is initialized
Wdt Config fuses:
WDT_DELAY_SEL (BLOCK0) Selects RTC WDT timeout␣
,→threshold at startup = 0 R/W (0b00)
Flash voltage (VDD_SPI) determined by GPIO45 on reset (GPIO45=High: VDD_
,→SPI pin is powered from internal 1.8V LDO
GPIO45=Low or NC: VDD_SPI pin is powered directly from VDD3P3_RTC_IO via␣
,→resistor Rspi. Typically this voltage is 3.3 V).
To get a dump for all eFuse registers.
espefuse.py -p PORT dump
Connecting....
Detecting chip type... ESP32-S2
BLOCK0 ( ) [0 ] read_regs: 00000000 00000000␣
,→00000000 00000000 00000000 00000000
MAC_SPI_8M_0 (BLOCK1 ) [1 ] read_regs: a1003a6e 00007cdf␣
,→00000000 00000000 00000000 00000000
BLOCK_SYS_DATA (BLOCK2 ) [2 ] read_regs: bbb8337d c8b3130b␣
,→e80e3771 92d5ab7c 8787ae10 02038687 38e50403 8628a386
BLOCK_USR_DATA (BLOCK3 ) [3 ] read_regs: 00000000 00000000␣
,→00000000 00000000 00000000 00000000 00000000 00000000
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Espressif Systems 814
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