I want to build a basic circuit (minimal functions) with the DA14580. My goal is to just have the antenna, the power source, the programming interface
and the oscillator on the board itself and connect all other pins to plug strips so I can add other circuits to the layout later
(eg. different inputs for the ADC, trying to controll something with the GPIO pins).
I read the start up guide and have a few questions:
-According to the guide, I can program the DA14580 via the SWDIO and SWCLK pins using a SWD interface
or use the pins P0_4 and P0_5 using a RS232 level converter. As it is now, I have no hardware limitations,
which interface should I use? Are there any drawbacks using another interface to program the DA14580?
-Is the 32kHz external sleep clock necessary if I operate in buck mode or can I use the internal oscillator without any drawbacks?
What factors should be considered when deciding which oscillator for the sleep clock to use?
-I want to use some of the GPIO pins for ADC measurement, do I have to put resistors infront of the pins?
And are the pins protected from higher voltage levels?
My sensor output will have a output coltage between 0V and 3V and an output current of around 10mA.
-Is it possible to solder the DA14580 onto the PCB using a reflow oven and a template for the solder paste?
-There is an application note on how to design printed antennas. Can I just use a ready made design for my layout
considering the limitations mentioned in the application note?
-My simple circuit is included and I want to have all floating pins connected to plugs to use with other circuits.
Can someone please confirm if the circuit will work or what I have to correct to make it work?
I know those are a lot of questions but I want to make sure the circuit is correct before I make the PCB
since I do not have the ressources to make multiple different PCBs of the minimalistic circuit I want to use
and want to add additional functionality later using bread boards or something cheaper than a PCB.