how to program 3.3v pics by icsp

[adnan_merter]

hi,
so far i have been working on 5v pics like 18f2550,2520 or 4550, but now i have to use a 3.3v low power pic. i decided to use pic18f26k20, it's pin diagram is same as pic18f2520 so i dont have to change my circuit design.

but there is one problem, so far i uploaded a basic bootloader to my 5v pics by brenner8 programmer and i updated the firmware by using pics uart connection. now how can i upload my bootloader to my 18f26k20. brenner8 supplies 13 volt to vpp and 5 volt to vdd, i already did some research and some guys say 18f26k20 has voltage tolerance for vpp and vdd but i am not sure, the datasheet says vpp voltage must not exceed 9 volt and vdd must be 3.3volt maximum,

so this pic is really tolerant to normal programming voltages or it burns up?

 

[bigdogguru]

According to the PIC-Brenner8 Website, a 3.3v adapter along with firmware updates are required to properly program the PIC16LF7xx, PIC16LF1xxx, PIC18FxxKxx and PIC18LFxxKxx series of PICs.





You might also consider purchasing a high quality PICkit clone if you intend on utilizing lower voltage PICs in future projects.

I have seen PICkit clones which support the PIC18FxxKxx series as well as most of the other PIC series at quite inexpensive prices.


BigDog

 

[adnan_merter]

I have seen PICkit clones which support the PIC18FxxKxx series as well as most of the other PIC series at quite inexpensive prices.

hi, i never used hi-tech, or c18 compilers i am familiar with the ccs c compiler and it doesn't support pickit3, can i use it with my codes compiled by ccs c compiler?

 

[ashugtiwari]

If using MPLAB with xc8 compiler, then for 3.3or lesser volt while using PICkit 3/ICD or higher programmer, go to right click on project-> properties -> on the left click on "ICD3" <if using ICD or PICkit 3> -> on right side in Options categories select "Program Options" -> there chek the checkbox "Enable Low Voltage Programming" and then Apply and OK.

But Im not sure if u will be able to debug or not but programming is done flawlessly if using 3.3 or lesser power supply.

 

[adnan_merter]

If using MPLAB with xc8 compiler, then for 3.3or lesser volt while using PICkit 3/ICD or higher programmer, go to right click on project-> properties -> on the left click on "ICD3" <if using ICD or PICkit 3> -> on right side in Options categories select "Program Options" -> there chek the checkbox "Enable Low Voltage Programming" and then Apply and OK.

But Im not sure if u will be able to debug or not but programming is done flawlessly if using 3.3 or lesser power supply.

thanks for your reply, but the problem is i don't have any icd or pickit programmer, so far i have been using brenner 8 with my 5 volt pics. brenner8 doesn't support 3.3 volt pics and i am looking for a solution, either do some modification to my brenner or buy a new pickit programmer.

bigdogguru says "buy a pickit3 clone" but pickit programmers are not supported by my ccs c compiler and i never used mplab before, is there any way to use pickit programmer with my ccs compiler?

 

[bigdogguru]

Actually, I suggested considering the purchase of a high quality PICkit clone, not necessarily a PICkit 3.

You might also consider purchasing a high quality PICkit clone if you intend on utilizing lower voltage PICs in future projects.

You might even consider purchasing a genuine PICkit 2, I occasionally see a few used PICkit 2s listed on eBay.

Does the CCS Compiler/IDE support the ICD 2?

If you a comfortable with the CCS Compiler and it continues to support the newer series of PICs, I do not see any reasons for changing compilers/IDEs.

Although, I believe you can run the CCS Compiler in Microchip MPLAB IDE which would allow you to use either the PICkit2/3 or ICD2/3 for either programming or debugging.


BigDog

 

[adnan_merter]

Although, I believe you can run the CCS Compiler in Microchip MPLAB IDE which would allow you to use either the PICkit2/3 or ICD2/3 for either programming or debugging.
BigDog

when i try to use ccs compiler in mplab ide, it switches automatically ccs compiler program at compile phase, i couldn't see a way to use ccs in MPLAB is there any?

 

[bigdogguru]

I've never utilized any the CCS Compilers, so my advice in that area is limited.

However, there are several HOWTOs available on the subject:

How do I get CCS to work inside MPLAB® IDE?

How to Create and Debug a Project in Mplab using CCS Compiler

**broken link removed**

MPLAB X + CCS C Compiler Tutorial How to

How do I generate code compatible with ICD (or ICD2)?

How can I use MPLAB® ICD 2, MPLAB ® ICD 3 and MPLAB® Real Ice™ with CCS Compiler?

BigDog