Bootloader for PIC18F46K20

D-Kens · Joined: 09 May 2005 Posts: 35 Location: Toulouse (France)

Hello everyone !

I've been using a regular PIC18F4620 for quite some times now, and always used Tiny Bootloader to update the firmware on RS232. Now I'm switching to use PIC18F46K20, so my question is : can I use the same HEX file than with the PIC18F4620 to load the bootloader into the PIC18F46K20 or do I have to modify it ? I'm not very familiar yet with the differences between the 18F4620 and the 18F46K20, but it seems it's mostly a consumption and technology matter, and bootloader should work the same. Isn't it ? Confused

Regards,
Christophe.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Look at the Programming Guides for each PIC. See if there are any
differences in the Config Bits and the Flash memory programming.

Webpage for 18F4620:
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010304

Webpage for 18F46K20:
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en026331

I looked at this table in each Programming Guide and there is a difference.
One PIC sets the WREN bit and the other does not. I don't know if that
is accurate or not. Maybe there is an errata on the documentation.

D-Kens · Joined: 09 May 2005 Posts: 35 Location: Toulouse (France)

Thanks for your advice : I guess I should have started by doing that. Downloaded both Programming Specifications : I'll read and compare them as soon as possible. Embarassed