2.4.2.1 VREF

Noise on VREF impacts the read performance of SmartFusion2/IGLOO2 devices. The VREF lines must be routed with no aggressive net or switching power supply nearby. Even the current is low, VREF must not be routed as trace as it is very susceptible to noise.

The following figure shows the VREF5 used for MDDR.

Figure 2-12. Layout of VREF5