For XO2, XO3 and ECP3/ECP5 the expected rise/fall time are shown below: Parameter Descriptions Conditions Max (ns) tR Input clock rise time 10% to 90% 1.0 tF Input clock fall time 90% to 10% 1.0
No. Although ispClock products have excellent jitter specifications, the dynamics of their PLLs are very different from those used in data transmission applications (such as those based on ITU-T G.8262). The key difference is in PLL loop bandwidth. ...
Description: The netsanitycheck error indicates general routing is used to drive the IDDR and/or ODDR components. The logic must be modified to use dedicated clock resources: Solution 1: Do not use generic logic (e.g. MUX implemented by LUTs) to ...
Definition: We will consider two cases: (1) the control (reset, set) and clock signals are active upon device power-up and (2) the control and clock signals are in-active upon power-up. Solution: In the first case, the register's output will be ...
Based on Lattice FPGA architecture, two flip flops in a slice share the same clock/clock enable/reset signals. So the two registers can be packed into one slice if their control signals are same. But sometimes if the reset and/or clock enable signals ...