Hi,
Thanks for the scope capture.

I think I can say that my waveform is very much the same as the real PICKit
1. I wonder you must be using the the latest firmware. Since you have looked
into the source. You should notice in v2.0.2, the VppOn, VppHigh etc have
been commented out. In my version I put it back. That was why it has a sharp
rise time to +13V. Also the second pulse should be longer as yours, anyway I
used a breakpoint and it has been came into effect. Also I have raised the
target voltage a bit.

Best regards,
WH Tan

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
Of Chen Xiao Fan
Sent: 11 July 2005 10:13
To: 'Microcontroller discussion list - Public.'
Subject: RE: [PIC] PICKIT 2 (was PICKit1 & PIC18F2550)


Attached please find the waveform captured after issuing a
read command for a 12F629. The scope is a Lecroy LT264.

Trace D is the zoom of channel 4 (Output of the boost converter
measured at positive terminal of C4 (47uF/25V).

Trace C is the zoom of channel 3 (Vpp/MCLR pin of 12F629).

It is quite clear that +13V is not constantly generated. I
have not measured ICD2. I guess that the +13V in ICD2 is
constantly generated (after USB enumeration).

Regards,
Xiaofan




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