Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

restarting my pic 16f877a

Status
Not open for further replies.
F

fiyasmp

Newbie level 5
Joined
Jun 13, 2009
Messages
10
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,353
check pic 16f877a crystal

i am using pic 16f877a, with wdt-disable, hs-16mhz uses 22pf, other cofiguration bits are disabled. it does't work well. i think the problem is with the oscillator...what can i do...
 

pic16f877a wdt issue

Hi

Need more info than that - some program code and circuit diagram would help, plus an actual description of exactly what is not working ie - nothing at all, doesn't turn a led on etc.

Have you tried running a simple 'flashing led' program to prove the software / hardware ?
 

pic16f877 current consumption

i did with the led but not working continuously.. i am using TOP programmer to program the pic.
 

pic 16f877a problem is resetting

power supply is ok. works sometimes when i press somewhere. is a resistor required btw osc2 and crystal. i uses 16mhz crystal. how can i test the crystal.
 

mypic

the resistor in oscillator is not much important,i never used that. as u said it works when u press somewhere in the board,then it might be due to Dry Soldering.please check your soldering in the board.if u doubt your crystal you can check with another crystal
 

    F

    fiyasmp

    Points: 2
    Helpful Answer Positive Rating
pic16f877a 16mhz working

thanks, i got it
 

led programming using 16f877a

i am expecting you will click Helped button if i helped you
 

pic16f877a restart

Check:
1-proper 5Vdc (not ac component)- with scope.
2-Master reset to be off or if is on to have >=4,5V on pin 1.
3-Good crystal, try with similar other just to see it runs.
4- Good soldering/contacts on all pins and ok capacitor.
 

pic16f877 16mhz cristal

I think there is problem in your circuit , i check its supply section , and current consumption in circuit
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top