Question: What is the accuracy of the switching/precharge clocks used in the CSD?
Response: The switching accuracy is dependent on the accuracy or tolerance of whatever clock is used as the source for the System Clock (SysClk). In typical applications, SysClk is derived from the Internal Main Oscillator (IMO) of the PSoC device. In the CSD application, all the blocks in the system have a clock source derived from SysClk. So, all clocks will have an accuracy that is the same as SysClk.
The IMO frequency tolerance over temperature and voltage can be seen in any PSoC device datasheet.