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Anonymous
Not applicable

I just want to confirm that CY8C20434-12LKXI and CY8C20434-12LQXI is same, if not please tell me that it's details of specifications.

   

Regards.

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19 Replies
Bob_Marlowe
Level 10
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You will have to ask Cypress for this matter. Create a "MyCase" (Support&Community->Technical Support).

   

The "K"-version is obsolete and the "Q" version is a drop-in replacement. But this does not mean that it will work the other way round.

   

 

   

Bob

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ETRO_SSN583
Level 9
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There is a package difference -

   

 

   

CY8C20434-LQXI     4 x 4 mm QFN

   

CY8C20434-LKXI     5 x 5 mm QFN

   

 

   

Regards, Dana.

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Anonymous
Not applicable

I have firmware project with CY8C20434-LKXI and Hardware contains CY8C20434-LQXI.

   

Unable to program target device, error occures.

   

Programmer Error: Unable to find device please check connection of programmer with device.

   

When i creating new project, device catlog not contain CY8C20434-LQXI part.

   

Please suggest solution.

   

Regards,

   

Pran.

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ETRO_SSN583
Level 9
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You would have to use an older version of PSOC Designer to get to the version

   

that supported your part of interest.

   

 

   

I would post a CASE and ask if LQXI is a valid part, if so then Designer

   

has an omission and Cypress should know that. Otherwise those

   

packages, LQXI and LKXI appear to be obsolete.

   

 

   

    

   

          

   

To file a tech case -

   

 

   

www.cypress.com

   

“Support”

   

“Technical Support”

   

“Create a MyCase”

   

 

   

Regards, Dana

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Anonymous
Not applicable

Dana, Have you got any reply from cypress?

   

Regards,

   

Pramod.

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ETRO_SSN583
Level 9
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I did not file a tech case, recommendation was for you to do that.

   

 

   

Regards, Dana.

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Anonymous
Not applicable

Dana,

   

I have alredy file a tech support a case, they told me to download PSoC 5.4 Designer and clone LKXI project in LQXI part.

   

I have done all this things and able to clone LKXI project in LQXI. 

   

But main problem remains unchanged: unable to find device , please check connection of device with programmer.

   

Pramod.

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Bob_Marlowe
Level 10
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So what remains not quite clear for me is: What is your actual target device you want to program? the "K" or the Q" device.

   

 

   

Bob

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ETRO_SSN583
Level 9
Level 9
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Odd, I opened programmer and the CY8C20434-12LQXI your desired target (and the -12LKXI) are

   

in the programmer catalog. Are you meeting programming interface specifications ?

   

 

   

    

   

          http://www.cypress.com/?rID=2583

   

 

   

Regards, Dana.

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Bob_Marlowe
Level 10
Level 10
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The CY8C20434-12LQXI is a "Drop-in replacement" which means it is electrically and logically (pinout) the same as the "K" version. Designer "knows" the chip, but seemingly the programmer cannot contact the chip correctly. Can you check for or even upload shematics of the connections you made to the ISSP - pins?

   

Who powers the chip?

   

Are you using a MiniProg? What are the settings?

   

As Dana said there is a difference in chip-size. Can it be that there is a soldering-problem with the different housing?

   

 

   

Bob

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Anonymous
Not applicable

Details of projects.

   

1]Softwres Used- PSoC Designer 5.2, PSoC Programmer 3.14.

   

2]Hardware Used- Miniprogrammer.

   

3]Device Used/Target- CY8C20434-12LQXI.

   

4]Firmware with-CY8C20434-12LKXI (As CY8C20434-12LQXI not avilable in PSoC designer 5.2).

   

5]Programmer Settings-

   

       Protocol- ISSP.   Voltage-5V. Verification-On.

   

       Programming Mode -Reset for external power supply and Power cycle for Power throug ISSP.

   

 6]Problem-

   

               | FAILED! Can not Acquire Device! Please verify the device connection to the Programmer
               Please, check the following items:
                 - the connection between the programmer and the PSoC;
                - the correct programming protocol is selected;
                - the correct connector option is selected.

   

After Cypress Techsupport Case:

   

I updated Designer to 5.4 version. Created Firmware with CY8C20434-12LQXI and targat is CY8C20434-12LQXI.

   

But still same error occures.
 

   

@Dana: 5.4 has both 'Q' and 'k' , 5.2 have only 'k'.

   

@BOB- No soldering issues as target is as per footprint given in package diagram.

   

Attached is zip of schematic connection of controller with ISSP.

   

Hope you understand all things.

   

Regards,

   

Pran.

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ETRO_SSN583
Level 9
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You have seen the guidelines here -

   

 

   

    

   

          http://www.cypress.com/?rID=2726

   

 

   

Did Cypress respond to you CASE ?

   

 

   

Regards, Dana.

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ETRO_SSN583
Level 9
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Based on your schematic I think you have data (SDA) and SCL reversed on your

   

header -

   

 

   

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Anonymous
Not applicable

@Dana,

   

Sorry, my mistak in shematic, interchanged SDA & SCL pins.

   

But it is correected in original design, so no issues.

   

As mention above cypress respond to my case, just they told me to update designer version.

   

They working with me slowly, Hope for good results,

   

Regards.

   

Pran.

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Anonymous
Not applicable

GOOD NEWS!!!!

   

Successfully Programmed my device.

   

Very Happy.

   

Thanks to all.

   

Pran.

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Bob_Marlowe
Level 10
Level 10
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Congratulations!!!

   

Will you be so kind to tell us what the final change was that lets you program your device successfully (whatever it was).

   

Just to have a chance to direct the next one (and there will be one!) into the right direction.

   

 

   

Bob

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ETRO_SSN583
Level 9
Level 9
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I am curious, you stated you had updated Designer earlier in thread,

   

so what did "fix" the situation ? Did you have an old Programmer

   

version installed ?

   

 

   

Regards, Dana.

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Anonymous
Not applicable

At last i made new sample of my hardware, with changes in design(small changes) with high precautions, also use proper soldering metod for QFN type of controller.

   

So at last i conclude at ther is no version issues and no controller type issues it is all about hardware design and soldering issues.

   

Thanks @Dana & @BOB.

   

Reagrds

   

Pran.

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ETRO_SSN583
Level 9
Level 9
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You are always welcome !

   

 

   

Regards, Dana.

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