MPC5606S datasheet(72/136 Pages) FREESCALE

Il numero della parte	MPC5606S

Spiegazioni elettronici	MPC5606S Microcontroller Data Sheet

PDF	136 Pages

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Produttore elettronici	FREESCALE [Freescale Semiconductor, Inc]

Homepage	http://www.freescale.com

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MPC5606S Microcontroller Data Sheet, Rev. 6

Freescale Semiconductor

3.7.4

Recommended power-up and power-down order

Figure 8 shows the recommended order for powering up the power supplies on this device.

The 1.2 V regulator output starts after the device’s internal POR (VDDREG HV) is deasserted at approximately 2.7 V on

VDDREG.

Figure 8. Recommended order for powering up the power supplies

CAUTION

The voltages VA and VB in Figure 8 must always obey the relation VB  VA –0.7V.

Otherwise, currents from the 1.2 V supply to the 3.3 V supply may result.

Figure 9 shows the recommended order for powering down the power supplies on this device.

It is acceptable for the VDD IO HV supply to ramp down faster than the 1.2 V regulator output, even if the latter takes time to

discharge the high 40

F capacitance. (The capacitor will ultimately discharge.)

VDDREG HV supply

VDDREG HV POR (internal)

1.2 V regulator output

Soft startup (approx. 200

s)

VDD IO HV supply (3–5.5 V)

 2.7 V

>= 200

s

MPC5606S Scheda tecnica(PDF) 72 Page - Freescale Semiconductor, Inc