This document describes issues of interest related to migration from the TMS320VC5420 to the TMS320VC5421. The objective of this document is to indicate differences between the two devices. Functions that are identical between the two devices are not included. For detailed information on the specific functions of either device, refer to the device data sheets, the TMS320C54x DSP CPU and Peripherals, Reference set Volume 1 (SPRU131), and the TMS320C54x DSP Enhanced Peripherals, Reference set Volume 5 (SPRU302).……