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Ixiasoft
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Ixiasoft
33.2.3. Board Layout and Pinout Considerations
When making decisions about the board layout and device pinout, try to minimize the skew between the SDRAM signals. For example, when assigning the device pinout, group the SDRAM signals, including the SDRAM clock output, physically close together. Also, you can use the Fast Input Register and Fast Output Register logic options in the Quartus® Prime software. These logic options place registers for the SDRAM signals in the I/O cells. Signals driven from registers in I/O cells have similar timing characteristics, such as tCO, tSU, and tH.