Hi Rob, Just a follow-up about setting PLL on 18F27J53. It works using "pragma target PLLEN P4". And it also works using OSCTUNE register (OSCTUNE_PLLEN = on). PLL requires 2ms before being stable. Clock diagram in datasheet show a XOR gate between PLLEN fuse (termed CFGPLLEN in datasheet) and OSCTUNE_PLLEN. But enabling both also works... Finally, sample codes from Microchip doesn't use CFGPLLEN (fuse) but prefer act on OSCTUNE_PLLEN.
Is it better to use OSCTUNE ? Can PLL be enabled at runtime ? (I read something about differences with this chip regarding, but can't remember what and where exactly). Should we do the same as Microchip ? Just some more thoughts... Cheers, Seb 2011/3/28 Rob Hamerling <[email protected]> > > Hi Seb, > > > On 2011/03/28 15:23, Sebastien Lelong wrote: > > >> Looks like this needs a program to update the PK2devicefile.dat! But >> that isn't mentioned. I have seen it in the past, it may be on my >> disk(s) somewhere! >> >> >> The second link (170KB) is working out of the box using PicKit 2.61 >> under Windows. In order to use pk2cmd under Linux, you'll need to modify >> app_cmd.h (IIRC). I can find a thread about this if you like. >> > > I downloaded that PKdDevideFile.dat and yes, it works (with the MicroChip > Windows software). That will do for me. Since I have a PicKit3 available I > use the Pickit2 only seldomly. > > > > Mmmh.... I read PicKit3 can adjust Vpp programming voltage, but not >> PicKit2. Still it's working... don't know how long... >> > > I don't know if Pickit2 cannot adjust Vpp. It can adjust Vdd, probably > based on the family. I suppose it adjusts Vpp as well based on the family. I > see no user-option to adjust Vpp neither for Pickit2 nor Pickit3 (in the > support programs of Microchip). > > > Regards, Rob. > > -- > R. Hamerling, Netherlands --- http://www.robh.nl > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/jallib?hl=en. > > -- Sébastien Lelong http://www.sirloon.net http://sirbot.org -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
