Hi RobJ,
On 03/01/2023 15.33, [email protected] wrote:
I had an e-mail discussion with the other Rob since he also had programming issues using LVP. It seems that for some (older?) PICs that have LVP only work if you pull a special PGM pin high (so not floating) with a resistor.
I'm afraid I have to correct this: When LVP is enabled and the PIC has a Pin_PGM, this pin requires a *pull_down* resistor to prevent the PIC entering LVP mode accidentally.
In order to prevent issues I could check which PICs have this PGM pin and for those PICs create only blink samples with LVP disabled. Another option is to enable LVP and mention in the blink sample comment to pull the PGM pin high for those PICs.
The *pull-down* requirement applies to every program, not only samples also user programs.
The reason (at least one of 'm) to specify LVP ENABLE in Jallib (blink) samples was that it allows the use the Microchip SNAP programmer (or any other LVP programmer) besides any HVP programmer like PicKit3. So my vote would be for adding a warning comment.
Regards, Rob. -- *Rob H*amerling, Vianen, NL -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jallib/bcc403f2-6580-1d18-0d8a-25109e7a933d%40gmail.com.
