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Quick start guide for MPC57xxM GTM

Posted: 02 Jul 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Generic Timer Module? GTM? data flow? eTPU? MCU?

The Generic Timer Module (GTM) is a data flow driven, large scalable timer with a modular design and a central routing unit. It supports over 200 timed I/O channels and includes application specific modules for hardware support of 4, 5, 6, and 8 cylinder applications for powertrain, transmission, and motor control, including angle clock hardware and motor commutation submodules. The system functionality of the GTM module is similar to that of the Freescale eTPU and eMIOS modules.

The GTM has been designed to minimise the amount of interaction between the GTM and the CPU. This is achieved through specific integrated technology, which results in fewer interrupt requests and therefore reduced CPU loading. Most functions are performed in parallel within the GTM's dedicated hardware units, ensuring simple latency calculations. Although the GTM itself is physically a large module in terms of gate count, the overall system cost is lowered by reducing the software overhead.

Some modules can be used independently as stand-alone functions that are controlled completely by the MCU's host processor. However, these modules can be combined together to create complex timing functions by using the Multi- Channel Sequencer and the Advanced Routing Unit to control inputs and output to the other GTM submodules.

View the PDF document for more information.

Originally published by Freescale Semiconductor at as "MPC57xxM Generic Timer Module (GTM) Quick Start Guide".

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