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kybert said:Hi,
I've read the datasheet and th eprogramming specs for the 12F629 device, and i cannot work out what the bandgap bits in the config should be.
There are 2 options:
highest bandgap voltage (11)
or
lowest bandgap voltage (00)
What is "bandgap" and what should i use???
kybert said:OK, i just hope my programmer does that then!
so do you know exactly what they do? I've emailed microchip asking them, but im not gonna hold my breath for a responce.
kybert said:Im using both! It is possible that my power supply may die (batteries) so i need them both.
kybert said:Yes the device has already been erased, the programmer did it automaticly...
Im using this programmer:
**broken link removed**
kybert said:Mine (i only have one) is reading '11'.
I need to set the bits to an applicable state in the HEX file config word, so i need to know what they do and what they should be. I dont have the option in the config word to "leave as they are".
__config 0x3D18
kybert said:That's how i am including the config word.
these is no config option to say "leave it alone" -- dam it... why do microchip do stupid things like add un-documented features to their devices! :twisted:
kybert said:the programmer software had a bug in it, whereby it would not copy the existing bandgap (calibration) bits.
This caused my devices to be rendered useless as there are too many variables to the factory set defaults, so i can do one of 2 things:
Send the devices back to microchip for re-calibration;
or
Chuck them out and buy a cupple more.
I have chosen the latter. It appears that these bits are factory set and once this data has been lost, it cannot be recovered!