2.2.5 Security and Integrity modules
The following security and integrity modules are available on this device:
Table 2-6. Security and integrity modules
Module Description
Random number generator (RNG) Supports the key generation algorithm defined in the Digital Signature Standard.
Cyclic Redundancy Check (CRC) Hardware CRC generator circuit using 16/32-bit shift register. Error detection for all
single, double, odd, and most multi-bit errors, programmable initial seed value, and
optional feature to transpose input data and CRC result via transpose register.
2.2.6 Analog modules
The following analog modules are available on this device:
Table 2-7. Analog modules
Module Description
16-bit analog-to-digital converters (ADC) 16-bit successive-approximation ADC
Analog comparators Compares two analog input voltages across the full range of the supply voltage.
6-bit digital-to-analog converters (DAC) 64-tap resistor ladder network which provides a selectable voltage reference for
applications where voltage reference is needed.
12-bit digital-to-analog converters (DAC) Low-power general-purpose DAC, whose output can be placed on an external pin
or set as one of the inputs to the analog comparator or ADC.
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
Table continues on the next page...
Chapter 2 Introduction
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 53
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