Can some one confirm the power consumption numbers we have come up with , based on the benchmark calculations provided on TI website for C6745:
- floating point --> 43 + 10 * Nr * Nh / 16
- fixed point --> nh * nr / 8 + 22
Basic filter info
- sample rate= 44.1kHz
- 32 bit data for FIR (actually 16-bit coefficients, 24 bit data)
- 2048 filter coefficients
- 32 word sample buffer (block FIR)
based on required clock speed we come up with
floating point core current consumption ~ 56ma
fixed point core current consumption ~ 11ma
We assume that we can run the part at 11MHz for fixed point solution and 56Mhz for floating point solution -- are these numbers in the ballpark?
regards
