Programmable Devices
CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers

cyclone II reset

Altera_Forum
Honored Contributor II
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Dear forum members :  

 

A general question on reset.  

 

1) Does the internal POR in Cyclone II device initialize all the config SRAMS to 0? - meaning will the "state machine state bits" be reset to 0's ?  

 

2) After configuration, should there be a User Reset signal (hard reset) to initialize the chip , and bring it to a known state , includign IOs?  

 

3) Can the user "reset" be hard reset or a soft reset ? If yes, should they be synchronous resets?. If the hard reset is not synchronized to a user clock ,where as "soft reset" is a "Q" of a register (flip-flop) bit , will the device function properly? - In this case the "soft reset" doesn't seem effective.  

 

4) Is there a synthesys directive to specifiy an initial condition for flops ( state machine states) , in case "hard reset " is not available and the "soft reset" doesn't function?  

 

thanks for the help  

...lifesec
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