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Wujun's avatar
Wujun
Icon for New Contributor rankNew Contributor
5 years ago
Solved

Can nPERST pins be used as PCIe reset if Intel® Stratix® 10 PCI Express* Hard IP is used as Root Complex?

Hello, According to the Pin Connection Guildline, Pin Functions of nPERST[L,R][0:2] are input or I/O. When you do not use this pin as the fundamental reset, you can use this pin as a user I/O pin. ...
Rahul_S_Intel1's avatar
Rahul_S_Intel1
Icon for Frequent Contributor rankFrequent Contributor
5 years ago

Hi,

Is it mean when I use this pin as fundamental reset, this pin is input?

>> Input

If I use the PCIe hard IP as PCIe Root Complex, do I need to assign a GPIO as fundamental reset? >> NO

Kindly find the explanation

When the PCIe HIP on a side (left or right) is enabled, the nPERST pins on that side cannot be used as general-purpose I/Os (GPIOs). In this case, connect the nPERST pin to the system PCIe nPERST signal to ensure that both ends of the link start link-training at the same time.