Need additional pins for SPI CS (simple question)

[simkard69]

Hello,

I'm using a bunch of SPI peripherals/devices on this board, and I actually just need 1 more CS pin (output).

Instead of adding an additional component (like a GPIO extension which might complexify a lot all of my whole code), I just had one simple question :

• As SIM7600 "DTR" pin seems to be an input (and an output for ESP32), may I use it without disturbing the SIM7600 module behavior ?

I actually took a look in the SIM7600 documentation (page 30) which doesn't seem to have CONS. This DTR pin seems to be used only for :

• DTR pin can be used to wake module from sleep.
• When module enters sleep mode, pulling down DTR can wake module.

Any chance to have a definitive answer on that ? 👍

Anyway, thank you for your fantastic products, greatly appreciated !