The TMS320VC5421 fixed-point digital signal processor (DSP) is a dual-core solution running at 200-MIPS performance. The '5421 consists of two DSP subsystems capable of core-to-core communications and a 128K-word zero-wait-state on-chip program memory shared by the two DSP subsystems. Each subsystem consists of one '54x DSP core, 32K-word program/data DARAM, 32K-word data SARAM, 2K-word ROM, three multichannel serial interfaces, xDMA logic, one timer, one APLL, and other miscellaneous circuitry. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. MicroStar is a trademark of Texas Instruments Incorporated. IEEE Standard 1149.1-1990, IEEE Standard Test-Access Port and Boundary Scan Architecture. Copyright 1999, Texas Instruments Incorporated