ESP32-HDK-dat
pins
You can use almost any GPIO, except:
GPIO6–11: used for flash
GPIO34–39: input-only (not usable as output like SCL)
RMT
- RMT_SIG_IN0~7
- Any GPIO Pins
- Eight channels for an IR transmitter and
RMT_SIG_OUT0~7 receiver of various waveforms
Functions
use PDM-dat instead of I2S-dat on ESP32-S3-dat
ESP32-DAC-dat - ESP32-I2C-dat - esp32-serial-dat - esp32-gpios-dat - esp32-usb-dat - ESP32-SPI-dat - ESP32-I2S-dat - sd-dat
ref
- https://electropeak.com/learn/full-guide-to-esp32-pinout-reference-what-gpio-pins-should-we-use/
- https://randomnerdtutorials.com/esp32-pinout-reference-gpios/
Module Compare
Diagram
boot mode
Table 3-1. Default Configuration of Strapping Pins
- from esp32 chip datasheet
| Strapping Pin | note | Default Configuration Bit | Value |
|---|---|---|---|
| GPIO0 | 0 | Pull-up | 1 |
| GPIO2 | 2 | Pull-down | 0 |
| MTDI | 12 | Pull-down | 0 |
| MTDO | 15 | Pull-up | 1 |
| GPIO5 | 5 | Pull-up | 1 |
Table 6: Chip Boot Mode Control
- from esp32 wroom module datasheet
| Boot Mode | GPIO0 | GPIO2 |
|---|---|---|
| SPI Boot Mode | 1 | Any value |
| Joint Download Boot Mode | 0 | 0 |
documentas
Chip-cn-dat/Espressif-dat/ESP32-dat/ESP32-HDK-dat/esp32_technical_reference_manual_en_v5.2.pdf
Chip-cn-dat/Espressif-dat/ESP32-dat/ESP32-HDK-dat/ESP32_Series_datasheet_v4.7.pdf
ref
EMAC = Ethernet