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Adventurer
Adventurer
373 Views
Registered: ‎08-30-2018

What does CPU_RESET pin exactly do in ZCU106 MPSoC board?

Hi,

I am using ZCU106 MPSoC evaluation board in my designs.

Looking at the ZCU106 User Guide, there are multiple reset pins:

 

PS_PROG_B : This action clears the programmable logic configuration, which can then be acted on by the PS software. (To my understanding, this will reset only the PL part)

 

CPU_RESET : only in page 9 of ZCU106 User Guide, it is written "PL-side CPU reset pushbutton". Does it reset only the PL part? If yes, why is it confusing with PS_PROG_B ? What is the differences?

 

Generally, can anyone elaborate that what does the CPU_RESET connected to pin G13 of FPGA fabric exactly do??

 Thank in advance for your kind replies and helps.

Best,

Daryon

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3 Replies
Xilinx Employee
Xilinx Employee
316 Views
Registered: ‎08-25-2010

回复: What does CPU_RESET pin exactly do in ZCU106 MPSoC board?

Hi @daryon

CPU_RESET is actually a regular reset in PL side. PS_SRST_B is commonly used for debugging, same effect as POR except some register unaffected, please see table 38-1, ug1085:

http://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf 

Thanks
Simon
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Adventurer
Adventurer
265 Views
Registered: ‎08-30-2018

回复: What does CPU_RESET pin exactly do in ZCU106 MPSoC board?

Hi @simon,

 

Thanks for your reply. I have simplified my initial question. Generally, I still did not get what is the main difference between CPU_RESET and PS_PROG_B ? Even the UG1085 does not clarify it!

 

Bests,

Daryon

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Xilinx Employee
Xilinx Employee
217 Views
Registered: ‎08-25-2010

回复: What does CPU_RESET pin exactly do in ZCU106 MPSoC board?

Hi @daryon

 

PS_PROG_B is PL configuration reset, used as reset PL configuration block. CPU_RESET is used to reset user logic if necessary.

Thanks
Simon
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