NXP Semiconductors freescale KV4 Series, Reference Manual

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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.
Motor control and power conversion features have been added through a dedicated set of
registers and defaults turn off all new features. The new features, such as hardware
deadtime insertion, polarity, fault control, and output forcing and masking, greatly reduce
loading on the execution software and are usually each controlled by a group of registers.
FlexTimer input triggers can be from comparators, ADC, or other submodules to initiate
timer functions automatically. These triggers can be linked in a variety of ways during
integration of the sub modules so please note the options available for used FlexTimer
configuration.
More than one FlexTimers may be synchronized to provide a larger timer with their
counters incrementing in unison, assuming the initialization, the input clocks, the initial
and final counting values are the same in each FlexTimer.
All main user access registers are buffered to ease the load on the executing software. A
number of trigger options exist to determine which registers are updated with this user
defined data.
39.2.2 Features
The FTM features include:
• FTM source clock is selectable
• Source clock can be the system clock, or an external 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
• 16-bit counter
Introduction
KV4x Reference Manual, Rev. 2, 02/2015
894
Preliminary
Freescale Semiconductor, Inc.