The IEM is a complete spacecraft avionics suite that provides C&DH and EPS functionality. The IEM is highly configurable in order to meet the widest range of system requirements possible. The IEM consists of multiple circuit cards (VME or compact PCI) that house the central processor, analog and digital telemetry processing, payload interface, power management, power switching, solar array control, and voltage regulation functions. The payload interface can be synchronous, asynchronous, or custom at speeds up to 10 Mbps. The IEM has flown successfully on STPSat-1.