Ok, I understand it a bit better now. Thank you :-) I'm starting to realize I have been using laptops for years and I know nothing about how they works.
2016-08-29 21:52 GMT+02:00 Luke Kenneth Casson Leighton <[email protected]>: > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Mon, Aug 29, 2016 at 8:15 PM, Raphaël Mélotte > <[email protected]> wrote: > > Of course ! I forgot the touchpad actually had an lcd. It will be so > great > > to be able to have some of those displayed right below the keyboard ! :-) > > I just saw the power button that's connected to the STM32F072 when > looking > > for something else. > > If I got it right, PCB1 receives the CPU card and powers PCB2 > > nope. PCB3 powers PCB2, which (through the STM32F) controls the > Battery / Power IC on PCB3, through which power to PCB1 is controlled. > > yes it literally has to be that complex because EOMA68 power is > "OTG-like" i.e. may be *TWO-WAY*. so the STM32F072 is responsible for > monitoring (through I2C in communication with the Battery / Power IC) > what is going on, also receives notification about power provision > from the EOMA68 Computer Card, and makes decisions whether to put the > Power IC into "OTG Host" or "OTG Client" power modes. > > look up the datasheet on the bq24193 for details. > > > which contains > > the STM32F072. Does that mean that a CPU card have to be plugged in in > order > > for the STM32F072 to be powered ? > > incorrect. the STM32F072 is powered continuously it can never be > powered off (short of opening up the laptop case and physically > disconnecting the battery). > > l. >
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