Datasheet

Clocking
FRDM-K64F Freedom Module User’s Guide, User's Guide, Rev. 1, 08/2016
NXP Semiconductors 9
Table 3. Features of MK64FN1M0VLL12
Feature
Description
Reliability, safety and
security
• Hardware encryption coprocessor for secure data transfer and storage. Faster than
software implementations and with minimal CPU loading. Supports a wide variety of
algorithms ‐ DES, 3DES, AES, MD5, SHA‐1, SHA‐256
• Memory protection unit provides memory protection for all masters on the cross bar
switch, increasing software reliability
• Cyclic redundancy check (CRC) engine validates memory contents and communication
data, increasing system reliability
• Independently‐clocked COP guards against clock skew or code runaway for fail‐safe
applications, such as the IEC 60730 safety standard for household appliances
• External watchdog monitor drives output pin to safe state for external components in the
event that a watchdog timeout occurs
• Included in NXP product longevity program, with assured supply for a minimum of 10
years after launch
5. Clocking
The Kinetis MCU startup from an internal digitally-controlled oscillator (DCO). Software can enable the
main external oscillator (EXTAL0/XTAL0) if desired. The external oscillator/resonator can range from
32.768 KHz up to 50 MHz. The default external source for the MCG oscillator inputs (EXTAL) is 50
MHz clock source from Micrel Ethernet PHY.
Figure 6. Micrel PHY provides 50 MHz for MCU