PIC 12F509 begins to heat at power up

[Pedro Pinto]

Hello

Thanks, i will try it. That is the first and unique project where i use a 8 pin PIC
The 12F509 have Flash Program Memory of 1.5 kBytes
The 12F508 have Flash Program Memory of 0.5 kBytes
Therfore i think that is correct - DEFINE OSCCAL_2K 1 - I hope i'm not wrong

The datasheet says - On Reset ALL pins are input.
I will test with GPIO = %00000000 and after that to set the
TRISIO = %11001111

I notice if i have success with this changes

Thanks All

Best Regards
Pedro

Para o Rui, quando estiveres o MSN, falamos

[Archangel]

Hello

Thanks, i will try it. That is the first and unique project where i use a 8 pin PIC
The 12F509 have Flash Program Memory of 1.5 kBytes
The 12F508 have Flash Program Memory of 0.5 kBytes
Therfore i think that is correct - DEFINE OSCCAL_2K 1 - I hope i'm not wrong

The datasheet says - On Reset ALL pins are input.
I will test with GPIO = %00000000 and after that to set the
TRISIO = %11001111

I notice if i have success with this changes

Thanks All

Best Regards
Pedro

Para o Rui, quando estiveres o MSN, falamos

I think you should have
DEFINE OSC 4
in your code. I have never seen OSSCAL done as a define before, I
do not see why not, but I have only seen it done as so:
OSCCAL = %0000000
or
OSCCAL = $00

ANYBODY want to give a short treatise on this ?

[mackrackit]

???????????

PicBasic Pro Compiler
calibration factor in the last location of code space. The on-chip
oscillator may be fine-tuned by acquiring the data from this location and
moving it into the OSCCAL register. Two DEFINEs have been created
to perform this task automatically each time the program starts:
Define OSCCAL_1K 1 ' Set OSCCAL for 1K
device
Define OSCCAL_2K 1 ' Set OSCCAL for 2K
device
Add one of these 2 DEFINEs near the beginning of the PicBasic Pro
program to perform the setting of OSCCAL.

[ErnieM]

Pedro,

Don't apologies for your English. I'm always amazed when people can learn anything (such as electronics) in something other then their native language: that double translation is huge, good for you for jumping it.

So in your code you state:

TRISIO = %11001111

That sets GP0 to GP3 to inputs, and GP4 and GP5 to outputs. Yet your schematic shows GP5 is the only output.

Which one is correct?

But that isn't the problem anyway, even if all pins are driven as low outputs there isn't enough current to make trouble. What does concern me is the GP2 input: if that ever mistakenly is used as an output it is directly connected to ground and hence will suck out a ton of current.

[Archangel]

???????????

Thanks Dave, I missed that.

[Pedro Pinto]

Hello ErnieM

The GPIO.2 is a input, like you can see on the TRIS
TRISIO = %11001111
This input alias "pulsador" have a resistor 27k to VCC and a press switch to GND to turn on a external circuit. When press the on button then the GPIO.5
go high and turn on the external circuit. The other pins are all inputs except the GPIO.4 that are output, on it in serie a resistor of 1k and after power up i make it low.

Best regards
Pedro