Pin status during standby mode on stm32f4xx

[Marco1]

Posted on March 29, 2017 at 12:16

Which is the state of pins I/O during standby mode ?

I not found any document about.

Thank you

[waclawek.jan]

Posted on March 29, 2017 at 12:34

RM0090 rev.13, 5.3.6  Standby mode

I/O states in Standby modeIn Standby mode, all I/O pins are high impedance except for:• Reset pad (still available)• RTC_AF1 pin (PC13) if configured for tamper, time stamp, RTC Alarm out, or RTCclock calibration out• WKUP pin (PA0), if enabled

JW

[Marco1]

Posted on March 29, 2017 at 13:01

Thank you !!!

[Vincent HUE]

Posted on January 22, 2018 at 14:46

all I/O pins are high impedance

How high is high ? Can you put a number to quantify the impedance ?

[waclawek.jan]

Posted on January 22, 2018 at 15:12

[Andrew Neil]

Posted on January 22, 2018 at 15:25

So

Waclawek.Jan

‌ scores a straight 2 on the RTFM-O-Meter !

[Vincent HUE]

Posted on January 22, 2018 at 16:12

Thanks !

I was looking for 'impedance', 'Ohm', 'Ω' and similar keywords, not 'current'.

So, we're talking about MΩ impedance, which isn't particularly high. I have voltage dividers in the same order, having one connected to such IOs will be impact the circuit.

[waclawek.jan]

Posted on January 22, 2018 at 16:32

IMO this is result of having the latchup protection circuitry.

Mind, this is generally a digital, not analog, IC.

JW