At 10.12 2005.07.11 +0800, you wrote:
>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
>
>[ pickit1.gif ]

Hi,
if I may ask, what is your oscilloscope brand/model?


 

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