Tarsil

I'm building this programer http://www.best-microcontroller-proj...r-circuit.html.
Does someone tried to program a 12f683 with a AN589 based programer?
Any tips about the software used whould be apreciated.

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If is too complicated.....most of the times is the wrong way.

blueroomelectronics

The 12F683 isn't in the supported list for that programmer.
http://www.ic-prog.com/index1.htm
Odd thing is it appears to be a HVP type programmer but they want you to pull LVP to GND (makes it seem like a low voltage programmer)
It does seem to support the more common 12F629 and 12F675.

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Bill
Smart Kits build Smart People
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Nigel Goodwin

Well the AN589 was originally ONLY for the 16C84, and it was never very popular, as it was quite a strange design.

But it uses the same programming connections as any serially programmed PIC, and should work with most PIC's supported by IC-Prog.

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PIC programmer software, and PIC Tutorials at:
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Tarsil

T Y for your answers. The idea that seems to program the 12f629/675 made me wonder. Because i only buy 12f683 (is cheaper than 629/675 and easyer to find.) I had to make a dedicated programer...asked about it on this forum.
The one I want to build it's a gift for someone who just bought a 16f84. I was just curious (shoot me) if someone used it for a 683. Hope that my friend will pass the '84 phase and still use the programer.

__________________
If is too complicated.....most of the times is the wrong way.

Nigel Goodwin

Why build a more complicated programmer that's not well supported?, just build a David Tait type one, like the P16PRO and P16PRO40.

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PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

Tarsil

Of course if it's to complicated....most of the time is the wrong way, but what can I say i like to tinker and experiment.

__________________
If is too complicated.....most of the times is the wrong way.

cesarsouza

Actually, you have to pull LVP to GND in some pics to program it properly in HVP mode. I don't know why this design is considered 'strange' because its internal workings are pretty much the same as the Tait type. And an589 works with almost every pic if you take enough care with wire crosstalking, decoupling and cable line termination, alltought those issues are present on most pic programmers.

Nigel Goodwin

It's considered 'strange' because it's over complicated, simply because it's designed using a bad choice of chips - with a little extra thought about was was required David Tait produced a simpler more useful design, and the AN589 was doomed!

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PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

cesarsouza

err.. Actually, I'm building a 'tait-type' right now and finding it bit more complicated. It uses more gates and more pull up/down resistors than the an589. Also, can the buffers really be switched between inverting and non-inverting without requiring any circuit changes?

I'm building this programmer because an589 did not permit control over the Vdd line and thus was not able to do 'vpp-before-vdd'. I'm not really sure if Tait's support that, but as the Vdd can be switched at will, I'm assuming it can

Nigel Goodwin

Yes, it just needs changes in the software.

Tait's do, but don't go for his original design, he wasn't (and isn't) a hardware designer, and he made the mistake of using CMOS switches for Vpp and Vdd - where he should have used PNP transistors (as he did later).

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk