Benchmarks in Time

C62xx C5x

DSP Cycle Time 5 ns 20 ns

Complex Block FIR 6.46 us 73.84 us

16 taps, 40 outputs

LMS Adaptive FIR 220 ns 1900 ns

16 taps, 1 output

IIR 135 ns 1860 ns

256 Point FFT 20.84 us 418.14 us

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Because the processor cycle time for the C6x is 5 nanoseconds and the processor cycle time for the C5x is 20 nanoseconds, we see an even more dramatic shift when we look at benchmarks in terms of time.

For instance, the last benchmark shown, the 256-point FFT, takes 418.14 microseconds for a C5x DSP, while the C6x completes it’s task in 20.84 microseconds, or twenty times faster.