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JHari's avatar
JHari
Icon for New Contributor rankNew Contributor
6 years ago

Can DIFFCLK pins be used as Input Signals for Cyclone IV E device?

We are using Cyclone IV Device with part no. EP4CE15F23C8N. We want to use the DIFFCLK_xn/p pins as input pin (to read interrupts) and use this information to implement a logic.

Can DIFFCLK pins be used as Input Signals for Cyclone IV E device?

2 Replies

  • a_x_h_75's avatar
    a_x_h_75
    Icon for Contributor rankContributor
    6 years ago

    Yes they can. By default these are the standard dedicated clock input pins and yes, they can be routed to allow them to be read.

    FYI - it's pretty quick to create a project, assign one of your input signals to one of these dedicated clock inputs and have Quartus tell you the answer...

    Cheers,

    Alex

  • Rahul_S_Intel1's avatar
    Rahul_S_Intel1
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago
    Hi Prakash, You can use the DIFFCLK_xn/p, only concern to check is that the pin is an GPIO pin. If it is GPIO pin you can connect. And for making sure, make a sample project and assign the IO pins. If there is any issue Quartus will throw error