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Re: [Usbpicprog-technical] PIC 16F628A
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From: ShadowCaster <sha...@gm...> - 2013-04-25 13:13:52
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Do you have any specific model for the VDD diode to propose? Something like 1N5822RL or 1N5817 will be acceptable? On Thu, Apr 25, 2013 at 3:44 PM, Frans Schreuder <fra...@gm...>wrote: > 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... > > 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 has been replaced by a 0R resistor (or a wire).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 μμ, 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...> 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 lis...@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... >>> 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 lis...@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 lis...@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 lis...@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... >> 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 lis...@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... > 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? |
