Clock sources
• Brownout reset (VDD < 1.9 V)
• Critical warn low voltage interrupt (LVI2.0)
• Peripheral low voltage interrupt (LVI2.7)
1.6.13 Phase Locked Loop
• Wide programmable output frequency: 240 MHz to 400 MHz
• Input reference clock frequency: 8 MHz to 16 MHz
• Detection of loss of lock and loss of reference clock
• Ability to power down
1.6.14 Clock sources
1.6.14.1 On-Chip Oscillators
• Tunable 8 MHz relaxation oscillator with 400 kHz at standby mode (divide-by-two
output)
• 32 kHz low frequency clock as secondary clock source for COP, EWM, PIT
1.6.14.2 Crystal Oscillator
• Support for both high ESR crystal oscillator (greater than 100-ohm ESR) and
ceramic resonator
• 4 MHz to 16 MHz operating frequency
1.6.15 Cyclic Redundancy Check (CRC) Generator
• Hardware 16/32-bit CRC generator
• High-speed hardware CRC calculation
• Programmable initial seed value
• Programmable 16/32-bit polynomial
• Error detection for all single, double, odd, and most multi-bit errors
• Option to transpose input data or output data (CRC result) bitwise or bytewise,1
which is required for certain CRC standards
• Option for inversion of final CRC result
1.6.16 General Purpose I/O (GPIO)
• 5 V tolerance
1. A bytewise transposition is not possible when accessing the CRC data register via 8-bit accesses. In this case, user
software must perform the bytewise transposition.
MC56F847xx Advance Information Data Sheet, Rev. 2, 06/2012.
12
Freescale Semiconductor, Inc.
Preliminary
General Business Information
FREESCALE [ Freescale ]
