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PSoC Creator & Designer Software

Anonymous
Not applicable

I am new to psoc1.  Thought there might be a way to do some custom logic in a digital block but it seems that you can only modify existing modules?  I need a simple clock recovery circuit for synchronous data but looking around I do not see anything that does what I want.  I have a circuit which uses 2 flip flops to clock a rising edge or falling edge and then triggers a counter (that resets at TC) giving me a clock.  The incoming data is NRZ and an edge determines a 0 and no edge means 1.  It has transparency (insert 0 after 5 consecutive 1's).  I can bit bang this but it would be nice if I could get a clock.  Be nicer if I could get the transparency as well.

   

Any help is greatly appreciated!

   

Keith

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1 Solution
Esteemed Contributor

There is a 3.5 x 3.9 package in the BLE family of parts.

   

 

   

Regards, Dana.

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5 Replies
Esteemed Contributor

Are you using PSOC 1 or 3/4/5LP ? The latter allows you to do it in drawn logic

   

or to do it with verilog.

   

 

   

A discussion here with some ref material -

   

http://www.cypress.com/forum/psoc-5-architecture/clock-recovery-receive-nrz-nrzi-design

   

 

   

Regards, Dana.

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Esteemed Contributor

Some design material on state machine creation.

   

 

   

http://www.cypress.com/?rID=44402     AN62510 - Implementing State Machines with PSoC® 3, PSoC 4, and PSoC 5LP

   

http://www.cypress.com/?rID=52365     State machines using LUTs Video

   

 

   

Regards, Dana.

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Anonymous
Not applicable

Thank you Dana for the references.  I am using a psoc1 because it is the only device that fits in the space I have (3mm x 3mm).  But I will attempt to figure out how to do the state machine in the psoc 1.  Any examples would be great if anyone has any.

   

thanks,

   

keith

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Esteemed Contributor

I think you need a HW state machine, which PSOC 1 does not have. Here are

   

SW state machine references -

   

 

   

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CCcQFjAB&url=http%3A%2F%2Fread.p...     AN2329

   

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCcQFjAA&url=http%3A%2F%2Fread.p...     AN2332

   

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB4QFjAA&url=http%3A%2F%2Fread.p...     AN2333

   

 

   

Regards, Dana.

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Esteemed Contributor

There is a 3.5 x 3.9 package in the BLE family of parts.

   

 

   

Regards, Dana.

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