Resource constraints in smart devices demand an efficient cryptosystem that allows for low power and memory consumption. This has led to popularity of comparatively efficient Elliptic Curve Cryptography (ECC). In this paper, much of ECC is implemented on re-configurable hardware i.e. FPGAs, which are costly and unfavorable as low-cost solutions. The authors present comprehensive yet efficient implementations of ECC on fixed-point TMS54xx series of Digital Signal Processors (DSP). 160-bit prime field GF (p) ECC is implemented over a wide range of coordinate choices.