mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 44

• Manufacturer Part Number: mfr4200
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Device Overview
2.2.4.1
External power and ground for I/O drivers.
2.2.4.2
External power and ground for I/O drivers and input to the internal voltage regulator.
2.2.4.3
Power is supplied to the MFR4200 core through VDD2_5 and VSS2_5. This 2.5 V supply is derived from
the internal voltage regulator. No static load is allowed on these pins. If VDDR is tied to ground, the
internal voltage regulator is turned off.
2.2.4.4
VDDA, VSSA are the power supply and ground input pins for the voltage regulator. They also provide the
reference voltages for the internal voltage regulator.
2.2.4.5
VDDOSC, VSSOSC provide operating voltage and ground for the oscillator. This allows the supply
voltage to the oscillator to be bypassed independently. This 2.5V voltage is generated by the internal
voltage regulator.
2.3
The internal Clock and Reset Generator block provides the internal clock signals for the FlexRay block
and all other modules.
Refer to
44
Chapter 5, “Clocks and Reset
System Clock Description
VDDX, VSSX — Power and Ground Pins for I/O Drivers
VDDR, VSSR — Power and Ground Pins for I/O Drivers and Internal
Voltage Regulator
VDD2_5, VSS2_5 — Core Power Pins
VDDA, VSSA — Power Supply Pins for VREG
VDDOSC, VSSOSC — Power Supply Pins for OSC
The VDDR pin enables the internal 3.3 V to 2.5 V voltage regulator. If this
pin is tied to ground, the internal voltage regulator is turned off.
Figure 2-5
No load is allowed except for bypass capacitors.
No load is allowed except for bypass capacitors.
shows the clock connections from the CRG to all modules.
Generator” for detailed information on clock generation.
MFR4200 Data Sheet, Rev. 0
NOTE
NOTE
NOTE
Freescale Semiconductor