Идя на встречу пожеланиям трудящихся, TI готовит вконец облегченный (и удешевленный) вариант tms320f2803х/2х Piccolo – питание одно, все что полагается МК есть на борту, а пашет почти как настоящий:

http://www.ti.com/corp/docs/landing/f280xx-piccolo/index.htm

Q: When would you need real-time control versus host control?
A: Dhrystone benchmarks show that an ARM-based controller such as the Cortex M3 is very well-suited
for host-control, general purpose applications. However, real-time control incorporates significant “math”
processing in addition to general purpose functions. The C28x™ real-time control MCU provides
significant performance boost to real-time control systems through the significant “math” processing
efficiency of the core.
Benchmark studies against Cortex M3 controllers reveal that Piccolo devices are:
• 30% faster for PID16 control algorithms
• 38% faster for PID32 control algoriththms
• 2X faster for digital power (buck loop) cycles
• 4X faster for advanced control filter (FIR) tap
Thus, for real-time control applications the C28x solution is the right microcontroller.