Issue link: https://resources.pcb.cadence.com/i/1180526
PSpice User Guide Digital simulation October 2019 624 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Initializing flip-flops To initialize all flip-flops and latches Select one of the three Flip-flop Initialization choices on the Options tab: ❑ If set to X, all flip-flops and latches produce an X (unknown state) until explicitly set or cleared, or until a known state is clocked in. Note: The X initialization is the safest setting, since many devices do not power up to a known state. However, the 0 and 1 settings are useful in situations where the initial state of the flip-flop is unimportant to the function of the circuit, such as a toggle flip-flop in a frequency divider. ❑ If set to 0, all such devices are cleared. ❑ If set to 1, all such devices are preset. Refer to the online PSpice Reference Guide for more information about flip-flops and latches. Starting the simulation To start the simulation From the PSpice menu, choose Run. After PSpice A/D completes the simulation, the graphical waveform analyzer starts automatically.