Pin Category Analysis for ESP32

From the datasheet for ESP32-MINI-1U, here are the pin groups you asked for:
Bootstrap / strapping pins
  • GPIO0
  • GPIO2
  • GPIO5
  • GPIO12 = MTDI
  • GPIO15 = MTDO
Input-only pins
  • GPIO34
  • GPIO35
  • GPIO36
  • GPIO37
  • GPIO38
  • GPIO39
These are input-only and do not support output functions.
Pins connected to internal memory
Pins tied to the in-package SPI flash / memory interface:
  • GPIO6
  • GPIO7
  • GPIO8
  • GPIO11
  • GPIO16
  • GPIO17
These are not intended for normal GPIO use. The datasheet notes they are connected to the integrated SPI flash and cannot be used for other purposes, except in the external PSRAM context.
USB pins
  • None
  • There are no native USB D+ / D- pins on this module.
If you want, I can also turn this into a pin audit table for your current part project and check whether the existing terminal properties match these categories.
Use the attached datasheet
Pull exact pin names
Flag package differences
Save pin notes
GND
EXP
GND
GND
GND
GND
I37
GND
IO27
NC
I34
IO32
IO5
GND
IO10
TXD0
GND
IO14
IO15
IO12
IO18
IO33
EXP
IO0
IO2
GND
EXP
NC
IO21
GND
IO25
IO23
EXP
I35
GND
I38
I36
EXP
IO4
GND
IO26
GND
EN
IO9
EXP
I39
IO22
GND
EXP
GND
RXD0
IO19
GND
GND
EXP
EXP
GND
NC
GND
3V3
GND
IO13
NC

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    parametric-v1

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