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I have now on this 16F1765 the internal temp sensor on a first DUT in action and need to check the accuracy and tolerance on other chips.

I calibrated it at 0°C and 50°C manually.
It resolves 1� ...

Thanks for the hint, I wanted to create extra delay, because of the bad samples I am wondering about, meanwhile I found inside the datasheet I have to wait 200us befor each internal tempread conversio ...

void pcbtemp(void)
{
disable_interrupts(INT_TIMER3);
setup_vref(TEMPERATURE_INDICATOR_ENABLED|TEMPERATURE_RANGE_HIGH);
set_adc_channel(TEMPERATUR ...

Thanks for the explanation ! The 'cheap like auto' ALSO means not precise or accurate so you NEED to calibrate every unit or accept a WIDE range as being 'valid'.

Jay

That's not a problem over a ...

I've never understood why anyone would put an internal temp indicator inside a micro.
Jay

You want to monitor the PCB temp to shut down or regulate back the power you move over the board. The shu ...

I am considering to use the 16F1765 internal TEMP_INDICATOR also and find this discussion quite late...

The main function I do with my pic project is to measure the LED junction temp with my new pa ...

If a counter based PWM is done, you may want to avoid visible flicker of a PWM based LED driver, if other interrupts are may delaying such port changes.
You can disable such other interrupts when c ...

I am using also Diodes for temp sensing and will soon have the US granted Patent doc in my hands - after paying the fees....... ;-)

But those are Power LEDs and I made an even simpler method than ...

I have just made a 4 channel 31855K sensor board with a 18F45k22 and an FTDI USB 232R chip and control this over virtual com port driver out of Visual C++ for temp data recordings. FTDI chip gives you ...

while(true)
{
if(input(pin_a1)==1)
{
while(input(pin_a1)==1);
}
++test; // should count only when button is re ...

If you want to SFR registers you define them with #word:

#WORD CLKDIV = 0x0744 //this is the correct adr
#WORD PLLFBD = 0x0746 //this is the correct adr

now you can also define also the bits ...

You have to verify out of the SFR registers if the clock settings are set correctly, because you mentioned that those chips should be identical, but may be not ??

If in case the behaviour is cause ...

Hi, try

#use delay(internal=140000000)

Hi,

I had the same problem in the beginning.
Inside the main.h file I am just using the delay command and get
the 64Mhz PLL. Inside my main code I do not
changing the clock. Best way to check t ...

Hi, does anybody tried the 18F45K22 ?

I am using the internal osc with PLL to obtain a 64Mhz clock without external resonator but my mute is meanwhile low, because I still have not managed to bring ...