Datasheet

4.5.4.3 Random Number Generator (RNG)
• Supports the key generation algorithm defined in the Digital Signature Standard
• http://www.itl.nist.gov/fipspubs/fip186.htm
• Integrated entropy sources capable of providing the PRNG with entropy for its seed
4.5.4.4 Tamper Detect
• Analog tamper detects (voltage, temperature, and clock)
• External tamper detects
• Active wire-mesh tamper detect
• Internal tamper detects (flash security and secure SRAM)
• Register locks, tamper enables and analog trim configuration bits
• Secure RTC with added support for automatic compensation
• 32-bit monotonic counter
• 256-bit secure storage (asynchronously erased on tamper detect)
• 32- to 256-bit general-purpose storage (not erased)
• Single backup supply
• Voltage monitor
• Active-low enable (minimum leakage power when disabled)
• Active-low output which asserts when voltage is lower than 1.5V to 1.62V or higher than 3.6V to 4V
• Temperature monitor
• Active-low enable (minimum leakage power when disabled)
• Active-low output which asserts when temperature is lower than -50C to -100C or higher than 125C to 175C
• Clock monitor
• Active-low enable (minimum leakage power when disabled)
• Active-low output which asserts when clock < ~16 kHz or > ~1 MHz
Analog
4.5.5.1 16-bit Analog-to-Digital Converter (ADC)
• Linear successive approximation algorithm with up to 16-bit resolution
• Output modes:
• Differential 16-bit, 13-bit, 11-bit, and 9-bit modes, in two’s complement 16-bit sign-extended format
• Single-ended 16-bit, 12-bit, 10-bit, and 8-bit modes, in right-justified unsigned format
• Single or continuous conversion
• Configurable sample time and conversion speed/power
• Conversion complete and hardware average complete flag and interrupt
• Input clock selectable from up to four sources
• Operation in low power modes for lower noise operation
• Asynchronous clock source for lower noise operation with option to output the clock
• Selectable asynchronous hardware conversion trigger with hardware channel select
• Automatic compare with interrupt for various programmable values
• Temperature sensor
• Hardware average function
• Selectable voltage reference
• Self-calibration mode
4.5.5
Analog
K20 Family Product Brief, Rev. 11, 08/2012
Freescale Semiconductor, Inc. 39