How to write the power-up block?

[dttrinh]

Hi all,

I am writing a DDR controller IP. I need to write a power-up block for this IP.

Power-up block will take care of the initialization process when the power is turn ON.
It means that when the power is ON, Reset_n signal will be kept LOW for 200us, then some loading register process will be done. There are no signals: clk and clk_n. Etc

I don't know how to write its codes, because I can not use the: always (@(posedge clk, negedge reset_n).

I never saw before how to write the power-up block like this.

Could you help me some document or RTL code of this power-up block please?

Thanks alot.

 

[gharuda]

putting power in sensitive list a power up block could be written.
use either level or edge depending upon requirement

 

[dttrinh]

putting power in sensitive list a power up block could be written.
use either level or edge depending upon requirement

Thanks alot.