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josh_bird
Beginner
116 Views

2 different clock domain for input/output data in SPI master?

Dear Sir,

I had a SPI_master question needs to be confirmed.

For my system, one sys_clk is 50MHz used for main clock and that SPI_master sck_o sync with sys_clk to output.

Could I apply another clock (latch_clk) that shift -120 with sys_clk (applied from PLL) to latch spi input data?

I would like to increase the setup/hold time and cover the pcb delay.

And, does any advantages/disadvantage for this architecture?

Btw, this spi_master works at CPOL=1 and CPHA=1 mode for now.

Please let my know if any opinion for this.

Thank you very much.

 

Josh

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2 Replies
87 Views

Hi,


What is the frequency latch_clk?


Thanks.

Best regards,

KhaiY


75 Views

Hi,


We do not receive any response from you to the previous question/reply/answer that I have 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


Best regards,

KhaiY


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