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can the pll locked signal of the max10 be used as the reset signal ?

zlan01
Beginner
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can the pll locked signal of the max10 be used as the reset signal ?

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EngWei_O_Intel
Employee
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Hi Zhang Lan

In general, we don't want to use the PLL lock signal as the reset signal directly. The reset will be an asynchronous reset and some of the PLL lock signals may toggle for a while before they stay in a static state. You must ensure that the asynchronous reset is debounced and filtered. You can refer to Asynchronous Reset section in the link below:

https://www.intel.cn/content/dam/altera-www/global/zh_CN/pdfs/literature/hb/qts/qts_qii51006.pdf

 

thanks.

Eng Wei

 

 

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zlan01
Beginner
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Thanks for your help,

and the information mentioned in the figure below  applys to  max10 or not ?

a119.png

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zlan01
Beginner
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and there are no INIT_DOWN and nINIT_DOWN signal, is there any other signal can be used as the init done signal for the max10 ?

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zlan01
Beginner
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that is I want to implement the similar reset circuit shown in the above figue in page 5 of AN 891, can I ?

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EngWei_O_Intel
Employee
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Hi Zhang Lan

 

Nope, this pin isn't available for Max10. Designers typically use an explicit reset signal for the design, which forces all registers into their appropriate values after reset. Intel recommends this practice to reset the device after power-up to restore the proper state.

 

thanks.

Eng Wei

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EngWei_O_Intel
Employee
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Hi Zhang Lan

We do not receive any response from you to the previous answer that have been provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.

 

Eng Wei

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zlan01
Beginner
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and  what is the explicit reset ? can you give me an example? please

the meaning of explicit  is indistinct,right ? and  how can I get a indistinc reset?

 

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EngWei_O_Intel
Employee
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Hi Zhang Lan

It means you can use an external pin to initialize the design upon power-up. The reset pin is just similar to any other input pin and is often applied asynchronously to the FPGA. As long as the duration of this global reset pulse is long enough, all the device flip-flops will enter the reset state.

You can find some other good sites for reading and I attached one of the Intel one:

https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd12091999_3143.html

 

Thanks.

Eng Wei

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