Connecting JTAG-SMT2-NC with Versal VM1802

[Joe306]

Hello, I'm looking to use the new Versal ACAP VM1802 with the JTAG-SMT2-NC device. The Versal does not have a PS_SRST_B pin. I am not sure how to connect pin 14 on the JTAG connector to the Versal. Can you please help me?

 

Thank you

Joe

VIB 42.pdf

Edited October 4, 2021 by Joe306

[JColvin]

Hi @Joe306,

If you are not using or planning to use the GPIO2 pin (what Vivado/a Zynq device would expect a PS_SRST_B pin to be located on), you can just leave it disconnected like the other two GPIO pins without issue. The JTAG SMT2-NC, like the other SMT modules, have built-in pull-up resistors to keep the pins from floating.

Let me know if you have any questions.

Thanks,
JColvin

[Joe306]

Hello, on the JTAG header pin 14 what would that connect to on the Versal?

Thank you very much,

Joe

[Joe306]

Hello, I was looking over AM011 Versal documentation on page 716 they have:

The Versal ACAP has just one dedicated reset pin, POR_B. This pin asserts the external power-on
reset, External_POR. The Versal device does not include the Zynq® UltraScale+™ MPSoC
PS_SRST_B reset pin.

Would it be possible to tie the POR signal from the Reset Switch into the Open Drain Buffer?

Take a look at the attachment and let me know your comments please.

 

Respectfully,

Joe

 

VIB 42.pdf

[Joe306]

Hello, I think I have the solution. I will use an Open Drain Buffer and tie the resets together and then use a Header to select which resets are tied together.