You may be able to help me understand what is happening.
If you program the 18f25k50 with a VDD of equal or less than 4.2v – all is good.
If you program the 18f25k50 with a VDD of greater than 4.2v – all is bad.
Is there anything in the documentation that you have seen that would support having to set VDD of equal or less than 4.2v.
Any ideas?
Evan
Last edit: Anobium 2018-10-08
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
The PIC18FXXK80 device family is available with or
without an internal core voltage regulator.
On the devices with a voltage regulator (“PIC18F” in the
part number), the regulator is always enabled. The regulator
input is taken from the microcontroller VDD pins.
The output of the regulator is supplied internally to the
VDDCORE/VCAP pin. This pin simultaneously serves as
both the regulator output and the microcontroller core
power input pin. For these devices, a low-ESR (< 5Ω)
capacitor is required on the VCAP/VDDCORE pin to stabilize
the voltage regulator output voltage. The VCAP/
VDDCORE pin must not be connected to VDD and must
use a capacitor that is typically 10 F connected to
ground.
You may be able to help me understand what is happening.
If you program the 18f25k50 with a VDD of equal or less than 4.2v – all is good.
If you program the 18f25k50 with a VDD of greater than 4.2v – all is bad.
Is there anything in the documentation that you have seen that would support having to set VDD of equal or less than 4.2v.
Any ideas?
Evan
Last edit: Anobium 2018-10-08
Is this what you are looking for
PIC18F66K80 Family Programming Specification
Para 2.4 Page 7