DRV8908-Q1EVM: Frequency tolerance about DRV8908-Q1

Hi TI team,

Test environment: Use the DRV8908-Q1EVM development board and DRV89xx-Q1 configuration panel with 12V power supply.
Test steps: Configure DRV89xx-Q1 with OUT1 as the output port, turn off OUT1 open circuit diagnostics, and set the frequency to 80HZ/100HZ/200HZ/2000HZ with OUT1 as the high-side driver as PWM output, and set the duty cycle to 5%/50%/95%, the configuration steps are as follows:

The following table shows the set values and actual test values:

It can be seen that there is a large gap between the actual test value and the set value, so my question is why this problem occurs and how to solve it? Many thanks!