FPGAs can cause severe damage to signals in the system (or other FPGA signals) due to too much high-speed SSO, as this can result in noise called simultaneous switching noise (SSN). SSN is also called ground bounce or VCC bounce. For single-ended standards, SSN is a process that provides transient currents from low to high and absorbs transient currents from high to low, simultaneously switching and causing multiple output drivers. Caused by changes in device voltage and system voltage. Visit Link: https://www.uetpcb.com/blog/184.html