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Fajung
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Registered: ‎11-06-2020

Versal mater SPI how to conncet 100 pcs SPI slave devices

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Hi Sir:

If we have about 100 pcs SPI slave devices need to control from Versal.

 

I see the Versal datasheet CS_N can use external 3 to 8 decoder to extend , but look like still not enough….

 

Do you have any suggestion about SPI block diagram design?

 

 

BR.

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venui
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Registered: ‎04-09-2019

Hi @Fajung ,

You can find the information related to SPI controller in the Versal TRM https://www.xilinx.com/support/documentation/architecture-manuals/am011-versal-acap-trm.pdf chapter 70

We have provision to access up to 8 slave devices only using PS SPI controller with 3 to 8 decoder logic.

Regards,

Venu

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venui
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Registered: ‎04-09-2019

Hi @Fajung ,

You can find the information related to SPI controller in the Versal TRM https://www.xilinx.com/support/documentation/architecture-manuals/am011-versal-acap-trm.pdf chapter 70

We have provision to access up to 8 slave devices only using PS SPI controller with 3 to 8 decoder logic.

Regards,

Venu

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Fajung
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Registered: ‎11-06-2020

Hi Venu:

Versal have two SPI controller (SPI0, SPI1), so each controller can use 3 to 8 decoder logic, is correct?

BR.

 

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venui
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Registered: ‎04-09-2019

Hi @Fajung ,

Yes you are correct.

Regards,

Venu

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