My board does not start when I remove the miniprog3 progamming tool

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Anonymous
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Hello

   

I am using a CY8C3865PVI_060. It is a small 48 pins PSoC3.

   

I can program/debug it using  the 3 lines /XRES SWDck SWDio and GND.

   

The board starts only if the miniprog3 is connected to the board (with the USD cable connected to the computer)

   

The miniprog3 set up is: SWD protocol, external power, reset acquire mode, 10pins connector

   

When I remove the miniprog3 the board does not start. I have no experience of this small package with optionnal XRES. On the 100pins package, I just remove the tool and the board starts.

   

thanks for your help.

   

regards jean

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ETRO_SSN583
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Consider posting a schematic.

   

 

   

Regards, Dana.

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Anonymous
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Hello

   

Here is the schematic

   

Jean

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Anonymous
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2nd test to add a pdf file

   

then test with a smaller png file

   

a dropbox link:    https://www.dropbox.com/s/ln7wegalf8hjvtw/CarteReceptBF_gz.PDF?dl=0

   

thanks for the help

   

Jean

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ETRO_SSN583
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Try dropbox.com and post a share link.

   

 

   

Regards. Dana.

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Anonymous
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Hello

   

Drop box link in my previous post updated

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ETRO_SSN583
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From the TRM the recommended bypassing looks like this -

   

 

   

 

   

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Anonymous
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 Hi Jean, Dana,

   

Please note when Miniprog3 when not powered pulls the XRES line to low state and hence holding the PSoC device in reset state. 

   

Make sure Miniprog3 is connected to PC via USB cable when the other end is connected to PSoC. 

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Anonymous
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hello

   

I have absolutely no problem with the miniprog3 probe, the problem is WITHOUT it.

   

anyway I will stack some more supply capacitors on the board as suggested by Dana

   

regards Jean

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Anonymous
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Hello

   

Problem solved

   

I just added a 1uF capacitor to the many 100nf on VDDD and the board starts.

   

I guess the reason was that the miniprog adds a capacitor to VDDD.

   

Thanks Dana

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ETRO_SSN583
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 Glad to have been of assistance.

   

 

   

Regards, Dana.

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