STM32F101 Stop Mode latency?

gahgerrits · ‎2014-03-20

Posted on March 20, 2014 at 14:22

Hello,

Does anyone know (has experience) how much time it takes the STM32F101 to reach quiescent current (say from 3mA to 100uA) when entering Stop Mode (from the moment __WFI is executed) or is it instantaneous?

Kind regards,

Gerben

gahgerrits · ‎2014-03-25

Posted on March 25, 2014 at 15:56

Ok...after removing some Capacitors from the board and feed the MCU ''directly'' it seems it takes the MCU about 375 microseconds to reach quiescent current.

I measured this by measuring the voltage drop over a 100 Ohm resistor at the ground.

See attached image for details.

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Attachments :

zoom_in_meting.jpg : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0se&d=%2Fa%2F0X0000000bey%2FYhhjaWYK73JDRcmyAyKEIhqCOpHB9vp8dgYLRmq0FK8&asPdf=false