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CCS/LAUNCHXL-F28379D: 3SPLL

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: CONTROLSUITE

Tool/software: Code Composer Studio

Hi

in SolarLib.pdf document about SPLL_3ph_SRF is written: "Step 3 – Initialize module in {ProjectName}-Main.c, where the inputs to the initialization function are the grid frequency (50/60Hz), the inverter ISR period value and the address of the pll object. Ensure that the ISR is running at a minimum frequency of 20KHz." 

but my switching frequency is 5kHz therefore ISR  is running in 5kHz(in single update) or 10kHz(in double update mode).
can i use SPLL_3ph_SRF function in my project?
what should i change?

thanks!