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Re: [Usbpicprog-technical] PIC 16F628A
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From: Frans S. <fra...@gm...> - 2013-04-25 12:44:18
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Yes you can just replace D4 with a wire, there are no problems if you do that. Also it is smart to replace the diode which is in series with VDD with a low drop shottky diode. On 25-4-2013 14:40, ShadowCaster wrote: > Hello Frans, > > Probably you didn't receive my previous e-mail due to the attached > picture, > > VDD is almost perfect 5V if i remember correctly. > > Can i change the D4 on my current board without any other side effects > or there are more changes needed ? I printed a board based on your > through hole schematics so if there are more changes involved probably > there will be difficult to implement. > > Regards, > Nick > > > On Wed, Apr 24, 2013 at 9:22 PM, Frans Schreuder > <fra...@gm... <mailto:fra...@gm...>> wrote: > > Hello Nick, > > The voltage is on the low side. For this reason, in the new > schematic, D4 has been replaced by a 0R resistor (or a wire). Have > you also measured VDD? > > Kind regards, > > Frans Schreuder > > > On 04/24/2013 07:54 PM, Nick wrote: >> Hello Frans, >> >> I measured the voltage between VPP and GND using a multimeter in >> the pic pins, it is 12.21V. I assume that this is not enough for >> programing the 628A? >> >> On 24/4/2013 3:46 ??, Frans Schreuder wrote: >>> The io_test function is good for an indication, but not very >>> accurate in voltage. Using a multimeter is a better option. >>> >>> On 24-4-2013 13:58, ShadowCaster wrote: >>>> Hello Frans, >>>> >>>> Thanks for your quick reply i'll double check the voltages but >>>> i think that VPP is 11.4 to 12.3 when i try the I/O test >>>> function in the software, i'll connect the programmer with the >>>> pic and check with a multimeter and the I/O test function. >>>> >>>> >>>> On Wed, Apr 24, 2013 at 2:26 PM, Frans Schreuder >>>> <fra...@gm... <mailto:fra...@gm...>> wrote: >>>> >>>> Dear Nick, >>>> >>>> The 16F628A PIC does work with the current software / >>>> firmware, although this pic is very selective when it comes >>>> to operating voltages. >>>> Please verify that VDD > 4.5V and VPP >13V with the pic >>>> connected. >>>> >>>> Regards, >>>> >>>> Frans >>>> >>>> >>>> On 24-4-2013 13:22, ShadowCaster wrote: >>>>> Hello, >>>>> >>>>> I implemented the programmer based on the designs and it >>>>> works flawlessly with a PIC 18F2550 and a 18F1320. >>>>> The thing is that i tried to program a 16F628A that should >>>>> be compatible, although it is properly detected it doesn't >>>>> write any data to it. When i read it i get a repeated >>>>> pattern : FF 3F FF 3F. >>>>> >>>>> I tried the same pic with a old serial programmer and it >>>>> is written without a problem so it is not a pic problem >>>>> >>>>> I tried both the latest stable as well as the latest devel >>>>> firmware/software. Is the functionality for this model >>>>> broken in the latest versions? Can somebody verify? >>>>> >>>>> Regards >>>>> Nick >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> Try New Relic Now & We'll Send You this Cool Shirt >>>>> New Relic is the only SaaS-based application performance monitoring service >>>>> that delivers powerful full stack analytics. Optimize and monitor your >>>>> browser, app, & servers with just a few lines of code. Try New Relic >>>>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>>>> >>>>> >>>>> _______________________________________________ >>>>> Usbpicprog-technical mailing list >>>>> Usb...@li... <mailto:Usb...@li...> >>>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Try New Relic Now & We'll Send You this Cool Shirt >>>> New Relic is the only SaaS-based application performance >>>> monitoring service >>>> that delivers powerful full stack analytics. Optimize and >>>> monitor your >>>> browser, app, & servers with just a few lines of code. Try >>>> New Relic >>>> and get this awesome Nerd Life shirt! >>>> http://p.sf.net/sfu/newrelic_d2d_apr >>>> _______________________________________________ >>>> Usbpicprog-technical mailing list >>>> Usb...@li... >>>> <mailto:Usb...@li...> >>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>>> >>>> >>>> >>>> >>>> -- >>>> When a man lies, he murders some part of the world.. >>>> These are the pale deaths which men miscall their lives.. >>>> All these I cannot bear to witness any longer.. >>>> Cannot the kingdom of salvation take me home? >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Try New Relic Now & We'll Send You this Cool Shirt >>>> New Relic is the only SaaS-based application performance monitoring service >>>> that delivers powerful full stack analytics. Optimize and monitor your >>>> browser, app, & servers with just a few lines of code. Try New Relic >>>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>>> >>>> >>>> _______________________________________________ >>>> Usbpicprog-technical mailing list >>>> Usb...@li... <mailto:Usb...@li...> >>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> Try New Relic Now & We'll Send You this Cool Shirt >>> New Relic is the only SaaS-based application performance monitoring service >>> that delivers powerful full stack analytics. Optimize and monitor your >>> browser, app, & servers with just a few lines of code. Try New Relic >>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>> >>> >>> _______________________________________________ >>> Usbpicprog-technical mailing list >>> Usb...@li... <mailto:Usb...@li...> >>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >> >> >> >> ------------------------------------------------------------------------------ >> Try New Relic Now & We'll Send You this Cool Shirt >> New Relic is the only SaaS-based application performance monitoring service >> that delivers powerful full stack analytics. Optimize and monitor your >> browser, app, & servers with just a few lines of code. Try New Relic >> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >> >> >> _______________________________________________ >> Usbpicprog-technical mailing list >> Usb...@li... <mailto:Usb...@li...> >> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance > monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! > http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Usbpicprog-technical mailing list > Usb...@li... > <mailto:Usb...@li...> > https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical > > > > > -- > When a man lies, he murders some part of the world.. > These are the pale deaths which men miscall their lives.. > All these I cannot bear to witness any longer.. > Cannot the kingdom of salvation take me home? > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > > > _______________________________________________ > Usbpicprog-technical mailing list > Usb...@li... > https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical |
