AN2897 Freescale Semiconductor / Motorola, AN2897 Datasheet - Page 29

• Manufacturer Part Number: AN2897
• Description: Using the eTPU Angle Clock
• Manufacturer: Freescale Semiconductor / Motorola

Summary
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Summary
The eTPU is particularly suited to applications where input and output actions are synchronized to the
position of a rotating wheel. The eTPU Angle Clock provides hardware which, when combined with the
proper software, can track the wheel angle through accelerations, decelerations, and a wide range of
speeds.
If a wheel is tracked by the eTPU Angle Clock, many output matches and input captures can operate on
an angle count as well as a time count, and even on combinations of the two. Compensations for speed
changes are made in the Angle Clock only. An angle-triggered event will occur on the best estimate of the
match angle.
The Angle Clock is complex to set up, but when running it offers an excellent integration of fast operating
hardware with the complex control of a software program. A Reference Design has been built to
demonstrate the operation of a periodic angle clock with other engine control functions. See your Freescale
representative for details.
Using the eTPU Angle Clock, Rev. 0
Freescale Semiconductor
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