SPRAD32 May   2022 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2AM26x FOC ISR Benchmarks
  4. 3Typical Application Scenarios for Traction Inverters
    1. 3.1 Sample ADC in Cycle 0 and Update PWM in Cycle 1
    2. 3.2 Sample ADC in First Half of Cycle 0 and Update PWM in Second Half of Cycle 0
  5. 4Summary
  6. 5References

3.1 Sample ADC in Cycle 0 and Update PWM in Cycle 1

As presented in Table 2-1, the FOC ISR takes 3.9 µs from PWM counting zero to PWM duty cycle updated. In a period of 100 µs at 10 kHz, the ISR only takes 3.9% of R5F at cluster 0 core 0, which is less than 1% time of all CPUs on AM263x. There are 99% of AM263x computation capability left to support other applications. But, it is highly recommended to keep control loop within one core as inter processor communication is time consuming, especially between different clusters.

Figure 3-1 Sample ADC in Cycle 0 and Update PWM in Cycle 1