blackbeard420/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf synced 2025-03-10 09:39:10 -04:00
Code Issues Projects Releases Wiki Activity

Extended information on using pins of ESP-WROVER-KIT that are shared among peripherals. Inspired by https://esp32.com/viewtopic.php?f=12&t=6856.

Browse Source
This commit is contained in:
krzychb 2018-11-29 16:56:49 +01:00
parent 56e4c6e5a3
commit 29b1f86f16
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
docs/en/get-started/get-started-wrover-kit.rst
View File

@ -129,7 +129,13 @@ JP14 |jp14| Enable RTS/CTS flow control for serial communication
Allocation of ESP32 Pins
------------------------
Several pins / terminals of ESP32 module are allocated to the on board hardware. Some of them, like GPIO0 or GPIO2, have multiple functions. If certain hardware is not installed, e.g. nothing is plugged in to the Camera / JP4 header, then selected GPIOs may be used for other purposes.
Several pins / terminals of ESP32 module are allocated to the on board hardware. If certain hardware is not installed, e.g. nothing is plugged in to the Camera / JP4 header, then selected GPIOs may be used for other purposes.
Some of pins, like GPIO0 or GPIO2, have multiple functions and some of them are shared among on board and optional peripheral devices. Certain combinations of peripherals cannot work together. For example it is not possible to do JTAG debugging of an application that is using SD card, because several pins are shared by JTAG and the SD card slot.
In other cases peripherals can coexist under certain conditions. This is applicable to e.g. LCD screen and SD card that share only a single pin GPIO21. This pin is used to provide D/C (Data / Control) signal for the LCD and CD (Card Detect) signal read from the SD card slot. If the card detect functionality is not essential, then it may be disabled by removing R167, so both LCD and SD may operate together.
For more details what pins are shared among peripherals please refer to the table below.
Main I/O Connector / JP1