Information

Table 2-7. Analog modules (continued)
Module Description
Voltage reference (VREF) Supplies an accurate voltage output that is trimmable in 0.5 mV steps. The VREF
can be used in medical applications, such as glucose meters, to provide a
reference voltage to biosensors or as a reference to analog peripherals, such as
the ADC, DAC, or CMP.
2.2.7 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
Table continues on the next page...
Module Functional Categories
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
58
Preliminary
Freescale Semiconductor, Inc.
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