Esp8266 DRV8825 with GPIO16/15

Using Arduino Project Guidance
1

I need to wire a 4th stepper motor driver to my esp8266. right now i use pins, 4,12,5,14,0,12,2,A0. It seems like there might be a slim chance i can use pins GPIO16/15 to control the stepper driver.

From what i read,
GPIO15/D8" SPI (CS) Boot fails if pulled HIGH"
GPIO16/D0 "HIGH at boot used to wake up from deep sleep"

Will i be able to use pins 15/16 for DRV8825 without problems during boot? I dont want to drive the motor during boot, but will the esp8266 boot if i with the stepper driver step/dir pin to those pins

4

apparently it works

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