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'[PIC] cant see device when connected in ISP'
2007\06\01@021819 by alan smith

picon face
its late.  First article boards in, pair of em.  Simple...16F818, nothing fancy, have the ISP tied to a header..mclr,power and pgc and pgd
 
 Hooking up either the ICD2 or the pickit2, it can't see the device, on either board.  
 
 Checked the power...device has power on its pins.
 
 double checked PGC and PCD to the right pins on the header, all is well.
 
 Verified the ICD2 and pickit2 talk to other devices.
 
 So....whats the typical suspect when the device cant be found? I even replaced one chip thinking...off (way off chance) it was bad.
 
 frustrated....heading to bed...looking for suggestions in the morning....gotta be simple!!!
 

     
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2007\06\01@052105 by Tamas Rudnai

face picon face
Hi Alan,

Last time I had a problem like this was that I forgot to select device
family so that PicKit2 was looking for mid-range device while I had a base
line hanging on it. Other possibility is that you have the first generation
of PicKit2 (black button) and you do not have the PGC&PGD pulled down to the
ground.

Tamas


On 6/1/07, alan smith <spam_OUTmicro_eng2TakeThisOuTspamyahoo.com> wrote:
{Quote hidden}

> -

2007\06\01@053226 by Tamas Rudnai

face picon face
Sorry, I was faster with typing then reading... ICD2 does not see that
device as well.

Do you have pull-down resistor on PGM pin?

Tamas


On 6/1/07, Tamas Rudnai <.....tamas.rudnaiKILLspamspam@spam@gmail.com> wrote:
{Quote hidden}

2007\06\01@131450 by alan smith

picon face
no....it was something even more stupid.  The symbol I used for the PIC in the schematic had the portB reversed....B7 at the top, B0 at the bottom (something to be said for always making your own symbols) so......I just looked at net names and tied B0 and B1 to the programming pins rather than B7 and B6.
 
 Once I ran new wires...all was fine.  After a few hours sleep, it was a little more obvious.

Tamas Rudnai <.....tamas.rudnaiKILLspamspam.....gmail.com> wrote:
 Hi Alan,

Last time I had a problem like this was that I forgot to select device
family so that PicKit2 was looking for mid-range device while I had a base
line hanging on it. Other possibility is that you have the first generation
of PicKit2 (black button) and you do not have the PGC&PGD pulled down to the
ground.

Tamas


On 6/1/07, alan smith wrote:
{Quote hidden}

> -

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