Boosting the performance of C2000(TM) MCUs This video explains the exciting new feature called the VCU, or Viterbi, Complex Math and CRC unit. VCU adds exciting CPU processing capabilities to the new C2000™ Piccolo™ F2806x series of microcontrollers. As the name implies, VCU adds a complex math arithmetic unit, a Viterbi unit, and a Cyclic redundancy check (CRC) unit.