Chapter 41
Low-Power Timer (LPTMR)
41.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
The low-power timer (LPTMR) can be configured to operate as a time counter with
optional prescaler, or as a pulse counter with optional glitch filter, across all power
modes, including the low-leakage modes. It can also continue operating through most
system reset events, allowing it to be used as a time of day counter.
41.1.1
Features
The features of the LPTMR module include:
• 16-bit time counter or pulse counter with compare
• Optional interrupt can generate asynchronous wakeup from any low-power mode
• Hardware trigger output
• Counter supports free-running mode or reset on compare
• Configurable clock source for prescaler/glitch filter
• Configurable input source for pulse counter
• Rising-edge or falling-edge
41.1.2
Modes of operation
The following table describes the operation of the LPTMR module in various modes.
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1041
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