Thanks Bob, that was the problem. I checked the config bits, and according to the datasheet it should be 3F01. the software set it to 3F11. I also got hold of a new version of the software, and it works like a charm Thanks again. Mias * Mias van Vuuren e-mail : vanvuum@vodacom.co.za -----Original Message----- From: Bob Simpson [mailto:bob@bobsimpson.freeserve.co.uk] Sent: Thursday, June 07, 2001 6:08 PM To: Mias Van Vuuren Subject: RE: [PIC]: 16f628 and P16Pro programmer Hi Mias, On most programming software when you set the fuses there is a window which gives you the fuse hex code. Check this manually against the data sheet for the 628 chip. This will tell you if the programmer software is programming the fuses correctly. If it is getting this wrong then most likely the osc settings etc. will also be wrong. If you give me a list of the programming fuse settings you are wanting to use I will get the hex fuse code that should be used. You can then compare with your settings. The LVP setting will only affect the LVP pin (can't remember the pin, it's in the spec), but check that you have the latest version of software. Let me know how you get on. Bo. -----Original Message----- From: Mias Van Vuuren [mailto:Vanvuum@vodacom.co.za] Sent: 07 June 2001 16:22 To: bob@bobsimpson.freeserve.co.uk Subject: RE: [PIC]: 16f628 and P16Pro programmer Thanks Bob. I have only recently started playing with this chip. If I leave the lvp on, would it have any significant changes on the normal operatio of the chip, i.e. will the chip operate in the same way as with lvp swithced off? Mias * Mias van Vuuren e-mail : vanvuum@vodacom.co.za -----Original Message----- From: Bob Simpson [mailto:bob@BOBSIMPSON.FREESERVE.CO.UK] Sent: Thursday, June 07, 2001 4:53 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [PIC]: 16f628 and P16Pro programmer Hi, I am not familiar with that programmer I use a Propic2 and had similar problems with the fuse settings. What may be happening is the Code Protect is getting set by accident. When this is set the chip reads all zero's and unless the programming software is aware that to clear the code protect on a 628 requires an unusual code string as part of the erase commands. Even now that I have the latest software for the Propic2 which will clear the code protect I still get the odd chip death. Email me if you need any further information. Bob. -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Mias Van Vuuren Sent: 07 June 2001 15:22 To: PICLIST@MITVMA.MIT.EDU Subject: [PIC]: 16f628 and P16Pro programmer Anybody , please help! I am trying to program a 16F628 with my P16PRO programmer, but each time I disable low voltage programming in the configuration bits, and try to program the pic, I blow the pic. It's not funny to 'blow' all that money in one easy mouse click. It happened with 3 pics now already, and each time it's the same problem. As long as I leave low voltage programming enabled, I have no problem. Thanks Mias * Mias van Vuuren e-mail : vanvuum@vodacom.co.za -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.