Problem with restarting of Samsung ARM S3F441FX

[keen]

arm arm arm S3F441FX

hi to all, question for all,

Samsung ARM s3f441fx is wide most usable arm I know,
but its behaviour is a little strange,
sometimes after reset does not start ! why ? sch connection close with
dataseet was made, when works it works very nice, but I thing something
is like that pins are not defined ... sometimes does not start .. but over
OC commander via JTAG I can start it everytime .. but in future in
application that is not the solution ..
Guys from Samasung gave no response, anyone know some reference
connection ? anyexperiance anywhere ? anything ?


best regards Keen

 

[dainis]

Re: arm arm arm S3F441FX

hi to all, question for all,

Samsung ARM s3f441fx is wide most usable arm I know,
but its behaviour is a little strange,
sometimes after reset does not start ! why ? sch connection close with
dataseet was made, when works it works very nice, but I thing something
is like that pins are not defined ... sometimes does not start .. but over
OC commander via JTAG I can start it everytime .. but in future in
application that is not the solution ..
Guys from Samasung gave no response, anyone know some reference
connection ? anyexperiance anywhere ? anything ?


best regards Keen

Maybe some incorrect or incomplete system register settings, or unespected interrupts (for example enable interrupts, witout proper interrupt handler) .... ?

 

[keen]

Re: arm arm arm S3F441FX

dainis,
no doubt, all MCU's have to fetch reset vector
after reset signal is over. This principe is 'hard wired'!
ARM core has two cores, mcu & jtag core able to controls mcu
core, probability is some pins are wrong defined maybe even float
at reset time, coused unpredictable situation at reset time, datasheet
says nothing .. micro is more than nice . but ..

regards Keen

 

[xipen]

I once used motorola's dsp 56f805 in my project,and I met this problem,sometimes it does not start,Finally I gave every global variable a fixed address and init them every start,then the problem solved.I think maybe the global variable is modified during run time,If the global variable data is burnned into ram ,and the start code does not init them,the system will crash,you can check if this happened.