Information

Chapter 35
FlexTimer Module (FTM)
35.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
The FlexTimer module (FTM) is a two-to-eight channel timer that supports input capture,
output compare, and the generation of PWM signals to control electric motor and power
management applications. The FTM time reference is a 16-bit counter that can be used as
an unsigned or signed counter.
35.1.1 FlexTimer philosophy
The FlexTimer is built upon a simple timer, the HCS08 Timer PWM Module – TPM,
used for many years on Freescale's 8-bit microcontrollers. The FlexTimer extends the
functionality to meet the demands of motor control, digital lighting solutions, and power
conversion, while providing low cost and backwards compatibility with the TPM module.
Several key enhancements are made:
• Signed up counter
• Deadtime insertion hardware
• Fault control inputs
• Enhanced triggering functionality
• Initialization and polarity control
All of the features common with the TPM have fully backwards compatible register
assignments. The FlexTimer can also use code on the same core platform without change
to perform the same functions.
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 687