PIC 16F628

[||Joe]

Hi, I have problem with building dejan box

I have PIC 16F628 / 20
I use hex by MTL
I tried different crystal
8mhz - bad box
4mhz - flashing work, but m-bus commands don't work - calculating checksum, F1,...
I have set fuses exactly as write MTL.
I don't know where is a problem, anybody can help me with it?

thx

Pavel

[Yasser]

Hi Pavel

Try changing the Oscillator fuse to HS instead of XT. It worked for some ppl

Best of Luck....post ur response too

Yasser

[masterross]

I have the same problem like Pavel ??
please help

Ross

[||Joe]

thanks for help but I tried change fuse to HS and result is still same /n/images/smiles/icon_frown.gif


Pavel

[||Joe]

Mas bud spatnej krystal, nebo ho zkus zapojit klasicky - z vyvodu krystalu kondenzatory 15-30 pF na zem.
Nektery krystaly bez kapacitni zateze kmitaji na vyssich harmonickych.

[masterross]

Hi,
I've put 2 - 33p capacitors to the crystal but the same - BAD BOX

Ross

[o_MAST]

Review your box, my with a pic 16F628-04/p and HS oscillator works fine. With XT oscillator say bad conection.

Bye

[masterross]

I fixed me problem /n/images/smiles/icon_smile.gif))
just changed osc from XT to HS

Ross