Can GPIF-II set ouptut GPIO as fast as clock?

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Anonymous
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Dear Cypress,

   

I set the GPIO in toggle mode and insert toggle action in two states which are continuously accessed in the state machine to and fro. 

   

But the result still can't solve my problem.  

   

In the picture below, I make a contrast of simulation and my design (Red part). 

   

Can GPIF-II set output GPIO as fast as Clock pulse? Because I need to design DDR signal.

   

Thanks!!

   

Liao

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KandlaguntaR_36
Moderator
Moderator
Moderator
25 solutions authored 10 solutions authored 5 solutions authored

Liao,

It is not possible to toggle a GPIO as fast as PCLK.

The maximum you can get is half of PCLK Speed.

Say PCLK = 100 MHz, GPIO Freq = 50 MHz

You can see the results using the Scope instead of simulation.

Regards,

Sridhar

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KandlaguntaR_36
Moderator
Moderator
Moderator
25 solutions authored 10 solutions authored 5 solutions authored

Liao,

It is not possible to toggle a GPIO as fast as PCLK.

The maximum you can get is half of PCLK Speed.

Say PCLK = 100 MHz, GPIO Freq = 50 MHz

You can see the results using the Scope instead of simulation.

Regards,

Sridhar

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