There are three different BIOS modules that concern themselves with timing services. The timer module manages the hardware timer peripheral on the device running the application.  By going through this BIOS module rather than taking direct control of the timer hardware, a developer can manage the timer in an easier and more intuitive way and also in a way that will be portable when porting to a different TI device. The clock module usually layers on top of the timer module and provides additional functionality, including providing BIOS with a basic time base and also allowing a way for functions to be fired off in a periodic way. The third module is timestamp which can provide a very powerful way to do benchmarks on the user’s code as well as help with debugging using the real time analysis tools.