OpenProg as pure 3,3V uW programmer - which circuits can be omitted?
An USB programmer for PIC, dsPIC, AVR, serial memories
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Hello!
I would like to build a 3,3V only micro-wire programmer based on OpenProg.
Can I omit RC0, RC1 and RC2 circuits and then add a voltage regulator after the PIC?
Should I consider the LF (2 - 5.5V) version of PIC18F2550 and voltage regulator at the input of the PIC?
Any advice will be appreciated.
Last edit: Anonymous 2016-06-07
For sure the DCDC high voltage part is not needed; VDD control is also not essential.
In case you use an external 3.3V regulator you need to reconfigure the device so that it doesn't use the internal one; and you have to connect VUSB to 3.3V.
The regular 18F2550 should be fine as well.
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Hello All?
I have toruble to read\write PIC18F14K50 with OP v 9.1
When i start this string:
./op -d 18F14K50 -ee -s _bootloader.hex
I got this message:
root@md:/usr/local/op_v9# ./OP_RUN
Programmer detected on /dev/usb/hiddev0
Firmware version 0.9.0
Hardware ID: 0.0.1 (18F2550)
USB voltage too low (VUSB<4.5V)
USB voltage too low (VUSB<4.5V)
HV regulator error
Programmer detected on /dev/usb/hiddev0
Firmware version 0.9.0
Hardware ID: 0.0.1 (18F2550)
3.3V Regulator not detected
I tryed to program PIC18F14K50 by the LVP 3v3 power scheme from the
Flashsh Memory Programming Specification from Microchip. (Figure 2-3)
Would You like to help me understand my error?
Apparently you're not using the 3.3V expansion board that is required to program that device.