mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 233

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 7
Oscillator (FLEXRAY)
7.1
The FLEXRAY module provides one oscillator concept:
7.1.1
The Pierce oscillator provides the following features:
Common features:
7.1.2
One mode of operation exists:
7.2
This section lists and describes the signals that connect off chip.
7.2.1
These pins provide the operating voltage (V
This allows the supply voltage to the FLEXRAY to be independently bypassed.
7.2.2
These pins provide the interface for either a crystal or a CMOS compatible clock to control the internal
clock generator circuitry. EXTAL is the external clock input or the input to the crystal oscillator amplifier.
Freescale Semiconductor
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A robust full swing Pierce oscillator with the possibility to feed in an external square wave
Wide high frequency operation range
No DC voltage applied across the crystal
Full rail-to-rail (2.5 V nominal) swing oscillation with low EM susceptibility
Fast start up
Clock monitor (CM)
Operation from the V
Full swing Pierce oscillator mode that can also be used to feed in an externally generated square
wave suitable for high frequency operation and harsh environments
Introduction
External Signal Description
Features
Modes of Operation
V
EXTAL and XTAL — Clock/Crystal Source Pins
DDOSC
and V
DDOSC
SSOSC
2.5 V (nominal) supply rail
— OSC Operating Voltage, OSC Ground
MFR4300 Data Sheet, Rev. 3
DDOSC
) and ground (V
SSOSC
) for the FLEXRAY circuitry.
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