Information

2.4.7 Timer modules
The following timer modules are available on this device:
Table 2-8. Timer modules
Module Description
Programmable delay block (PDB) • 16-bit resolution
• 3-bit prescaler
• Positive transition of trigger event signal initiates the counter
• Supports two triggered delay output signals, each with an independently-
controlled delay from the trigger event
• Outputs can be OR'd together to schedule two conversions from one input
trigger event and can schedule precise edge placement for a pulsed output.
This feature is used to generate the control signal for the CMP windowing
feature and output to a package pin if needed for applications, such as
critical conductive mode power factor correction.
• Continuous-pulse output or single-shot mode supported, each output is
independently enabled, with possible trigger events
• Supports bypass mode
• Supports DMA
Flexible timer modules (FTM) • Selectable FTM source clock, programmable prescaler
• 16-bit counter supporting free-running or initial/final value, and counting is up
or up-down
• Input capture, output compare, and edge-aligned and center-aligned PWM
modes
• Operation of FTM channels as pairs with equal outputs, pairs with
complimentary outputs, or independent channels with independent outputs
• Deadtime insertion is available for each complementary pair
• Generation of hardware triggers
• Software control of PWM outputs
• Up to 4 fault inputs for global fault control
• Configurable channel polarity
• Programmable interrupt on input capture, reference compare, overflowed
counter, or detected fault condition
• Quadrature decoder with input filters, relative position counting, and interrupt
on position count or capture of position count on external event
• DMA support for FTM events
Periodic interrupt timers (PIT) • Four general purpose interrupt timers
• Interrupt timers for triggering ADC conversions
• 32-bit counter resolution
• Clocked by system clock frequency
• DMA support
Low-power timer (LPTimer) • Selectable clock for prescaler/glitch filter of 1 kHz (internal LPO), 32.768 kHz
(external crystal), or internal reference clock
• Configurable Glitch Filter or Prescaler with 16-bit counter
• 16-bit time or pulse counter with compare
• Interrupt generated on Timer Compare
• Hardware trigger generated on Timer Compare
Table continues on the next page...
Chapter 2 Introduction
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 55