Component Pin Configuration

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Looking for "Which pins are bootstrap or strapping pins? List pin names and numbers if available." in user-guide-devkitc-1.html

Looking for "Which pins are input only? List pin names and numbers if available." in user-guide-devkitc-1.html

Looking for "Which pins are connected to internal memory, such as SPI flash or PSRAM, and therefore should not be used for other purposes? List pin names and numbers if available." in user-guide-devkitc-1.html

Looking for "For the module used on this board, which GPIOs are unavailable for external use because they are used internally by SPI flash or PSRAM? Include any notes about module variants." in user-guide-devkitc-1.html

I checked the datasheet/board documentation for this part and the pin groups are:
Bootstrap / strapping pins
These are the 4 strapping GPIOs called out for boot/configuration:
  • GPIO0 - boot mode strapping
  • GPIO46 - boot mode strapping
  • GPIO45 - VDD_SPI voltage strapping
  • GPIO3 - JTAG signal source strapping
On the dev board headers, those map as:
  • GPIO0 -> J3 pin 14
  • GPIO45 -> J3 pin 15
  • GPIO3 -> J1 pin 13
  • GPIO46 -> J1 pin 14
Input-only pins
  • GPIO46 - input-only on this device/board documentation
Pins connected to internal memory
For the module variants used on this board, these pins are used internally for SPI flash/PSRAM communication and are not available for external use:
  • GPIO35 - J3 pin 13
  • GPIO36 - J3 pin 12
  • GPIO37 - J3 pin 11
The board documentation also notes that this internal-memory reservation applies to boards using ESP32-S3-WROOM-1/1U with Octal SPI flash/PSRAM and ESP32-S3-WROOM-2 variants.
If you want, I can next turn this into a Flux-ready terminal property table with columns like Pin Name | Pin Number | Pin Type | Section | Pin Group | Notes.
Use uploaded datasheet
Group by pin type
Quote datasheet wording
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