I have a doubt about the IPBus Clock in the MPC5643L Microcontroller Reference Manual on Page444,
How the IPBus Clock caculate? i cann't find the explanation about the PBus clock.
Search the manual for Peripheral Clock or Motor Control Clock (the name is not consistent throughout the manual). It is described in chapter 10 and chapter 11.
The peripheral clock is obtain via different dividers from the external quartz.