GXB_transceivers

[Altera_Forum]

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

[Altera_Forum]

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