8.4.6.4 Common-mode Reference Settling Time
The duration of the common-mode settling time is defined by the VCOM capacitor. With a 10-nF VCOM
capacitor, the common-mode reference requires 16 μs to settle. On the other hand, the duration of the commonmode
settling window is defined as 128 × T0, where the time unit T0 is determined by the external clock
frequency and the value of the CLOCKIN_DIV bit, as explained in the Timing Control and Frequency Scaling
(CLKIN) section.
A frequency of 8 MHz will result in a settling window of 128 × 1 / 8 MHz, which equals to 16 μs. Increasing the
value of the VCOM capacitor will increase the common-mode settling time, but for the same 8-MHz frequency,
the duration of the common-mode settling window will remain at 16 μs. In such situation, the common-mode
reference will take multiple TOF cycles to reach its final value when starting from zero initial conditions.
Question: I use VCOM capacitor 100-nf, select "Standard TOF Measurement" mode, and frequency of 16 MHz(settling window of 128x1/16Mhz).The manual
instructs that " In such situation, the common-mode reference will take multiple TOF cycles to reach its final value when starting from zero initial conditions."，How to understand this sentence？ Should I do something additional in my software to achieve this?
The figure below is the test result,it seems to show no effect.
