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Altera_Forum's avatar
Altera_Forum
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16 years ago

GXB_transceivers

hi,

I am using Quartus II 9.0 (SP2) and EP2AGX190FF35I5 device.

I have basic doubts regarding ARRIA II GX Tranceivers, which i am listing below.....

1. How to enable the transceivers?whether i have to use any megawizad function?

2. When i am compiling quartus is giving a critical warning "Synopsys Constraints File" does not exist for timing model.

3. In report quartus is showing timing models as "preliminary.

4. Pin assignments i am assigning as PCML 1.5V....when compiling quartus is giving errors as:

Error: Differential I/O output pin Tx_gxb[0] is assigned to a non differential location B31. However, it must be assigned to a differential output location

Error: Differential I/O input pin Rx_gxb[0] is assigned to a non differential location C33. However, it must be assigned to a differential input location

thanks

Ramu

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    1 - Transcievers are enabled by creating an instance of the altgxb megafunction in your design and connecting it to an appropriate transceiver pin.

    2 - The "Synopsys Constraints File" (SDC) provides Quartus with the timing constraints for your design. You must create one:

    http://www.altera.com/support/software/timequest/sof-qts-timequest.html

    3 - Timing models for Arria II GX are preliminary in Quartus 9.0.

    4 - This error can occur if you've assigned the pin to be a differential I/O type but the pin is not actually used or connected to appropriate logic in your design (e.g. you haven't connected it to an altgxb instance).

    Jake