mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 45

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

2.4.4.1
External power and ground for I/O drivers.
2.4.4.2
External power and ground for I/O drivers and input to the internal voltage regulator.
2.4.4.3
Power is supplied to the MFR4300 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.
2.4.4.4
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.
2.4.4.5
VDDOSC, VSSOSC provide operating voltage and ground for the oscillator. This allows the supply
voltage to the oscillator to be bypassed independently. This 2.5 V voltage is generated by the internal
voltage regulator.
2.5
Refer to
modes of operation.
2.6
2.6.1
A continuous external 4/10/40 MHz output clock signal is provided by the CC on the CLKOUT pin. See
Section 2.4.3.15, “CLKOUT — Clock
Freescale Semiconductor
Section 3.1.6, “Modes of Operation”
Modes of Operation
External Clock and Host Interface Selection
External 4/10/40 MHz Output Clock
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.
No load is allowed except for bypass capacitors.
No load is allowed except for bypass capacitors.
Output” for details of when this signal is active.
MFR4300 Data Sheet, Rev. 3
for full descriptions of the MFR4300 Disabled and Normal
NOTE
NOTE
NOTE
Device Overview
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