Questions about MPC566 PIT interrupts

[illtll801021]

Hello everyone

I have designed a control system using MPC566, the design of hardware referred to the MPC566EVB, and used Codewarrior and MPC500 Quick Start 4.0, including the Configuration tool,to develop the software. There are many tasks running in PIT interrupts. The system has been used for a long time, it usually can run correctly, but it occasionally presents a phenomenon that the main task can run normally while the PIT interrupts can not execute, when the system is powered up. Why? Have you found the phenomenon? Are there any questions on hardware? Please help me.

Thanks a lot!