Introduction - NXP Semiconductors MC9S08SU16 Reference Manual

Introduction

19.2 Introduction
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
The FlexTimer module is a two to eight channel timer which 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 unsigned counter.
19.2.1 FlexTimer philosophy
The FlexTimer is built upon a very simple timer used for many years on NXP's 8-bit
microcontrollers, the HCS08 Timer PWM Module – TPM. 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.
All of the features common with the TPM module have fully backwards compatible
register assignments and the FlexTimer can use code on the same core platform without
change to perform the same functions.
19.2.2 Features
The FTM features include:
• Selectable FTM source clock:
• Source clock can be the system clock, the fixed frequency clock, or an external
clock
• Fixed frequency clock is an additional clock input to allow the selection of an on
chip clock source other than the system clock
• Selecting external clock connects FTM clock to a chip level input pin therefore
allowing to synchronize the FTM counter with an off chip clock source
• Prescaler divide-by 1, 2, 4, 8, 16, 32, 64, or 128
• FTM has a 16-bit counter
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NOTE
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
NXP Semiconductors