Do GPIO pins maintain their state when the STM32F4xx goes into STOP mode?

[Dennis Jackson]

Posted on January 30, 2017 at 19:38

The reference manual, RM 00090, does not explicitly stay what happens to the GPIO lines when STOP mode is entered.  If a pin is high, does it stay high?

#stop-mode #gpio

[waclawek.jan · Accepted solution]

Posted on January 30, 2017 at 21:50

RM0090, rev.13, p.122:

In Stop mode: the main regulator or low-power regulator supplies a low-power voltage to the 1.2V domain, thus preserving the content of registers and internal SRAM.

GPIO are no different from other peripherals.

JW