On Sunday 11 September 2005 01:48 am, Chen Xiao Fan scribbled:
> I think it is a ICD2 firmware bug (or more kind words --"unimplemented
> feature"). It can not program a 12F629/675 with internal MCLR and
> internal RC oscillator and I have to use a PICkit 1 to program the
> 12F629. Now I have both PICkit 1 and Promate III and I of course like
> Promate III (US$895) slightly better than PICkit 1 (US$35). ;)-

I can program 12F629/12F675's easily with a homebuilt Tait parallel programmer 
(<$10) and Odyssey on Linux (my preferred environment).

But the important thing here (going back to the 16F88) is that I was using the 
*external* oscillator setting.


> However we use ICD2 to program 16F819 and got no problems at all but we are
> using 20M or 10Mhz ceramic resonator. ICD2 should program 16F819 and
> 16F88 without any problem, at least if the chip is not on a board. Take
> note we are using original ICD2.

The chip is NOT in circuit here either.


> Where do you get MPLAB 7.30? MPLAB 7.21 is the latest and I will
> recommend Version 7.20 against 7.21 if you do not need the new features
> of 7.20.

Oops -- that should've bene 7.20.  IIRC, 7.21 was a development release, which 
I usually stay away from.


> Check your ICD2 clone again to see if it cut corners in some places.
> Wisp628 should support both chips and it is very easy to build. Xwisp2
> v1.70 just released will support Windows/Linux and OS/2.

I just got and am still evaluating this clone, which claims to be fully ICD2 
compatible.  I went with the ICD2 since it is supposed to support a wide 
range of PICs, and I would really like to start using the debugging feature, 
even if it means I have to install a Windows OS for now.

Are Microchip's schematics for the ICD2 public anywhere?  I had seen the 
original ICD schematics somewhere in the past, but not the ICD2.    BTW, does 
your ICD control the Vdd line?  I don't know why, but I find that rather 
unusual that it does not.

Cheers,
-Neil.


>
>
> Regards,
> Xiaofan
>
> ----- Original Message -----
> From: "PicDude" <picdude2@narwani.org>
> Newsgroups: gmane.comp.hardware.microcontrollers.pic
> Sent: Sunday, September 11, 2005 11:07 AM
> Subject: [PIC] Running into programming walls
>
>
> Arrrggghhh!!! I'm stumped, and frustrated.
>
> So my questions -- if some PIC's require Vdd-before-Vpp, why doesn't the
> ICD2  control Vdd?  Are the 16F819 and 16F88 really Vdd-before-Vpp
> devices?  I've  never really read-thru any programming specs before,
> but maybe I'll check one  out.
>
> Most importantly is what I can do at this point, and is there really
> a  programmer that properly supports the 16F818 and 16F88?  From some
> research, the F88 should be easy, but I'm not sure why it locked up.
> The F819 appears to be problematic, but there must be a supported
> programming HW/SW combo that works for this, right?
>
> Cheers,
> -Neil.


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