MCF5373CAB180 datasheet(18/42 Pages) FREESCALE

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MCF5373 ColdFire® Microprocessor Data Sheet, Rev. 0.3

Preliminary

Preliminary Electrical Characteristics

Freescale Semiconductor

Figure 7. USB VDD Power Filter

NOTE

In addition to the above filter circuitry, a 0.01 F capacitor is also

recommended in parallel with those shown.

5.4.3

Supply Voltage Sequencing and Separation Cautions

Figure 8 shows situations in sequencing the I/O VDD (EVDD), SDRAM VDD (SDVDD), PLL VDD

(PLLVDD), and Core VDD (IVDD).

Figure 8. Supply Voltage Sequencing and Separation Cautions

The relationship between SDVDD and EVDD is non-critical during power-up and power-down sequences.

Both SDVDD (2.5V or 3.3V) and EVDD are specified relative to IVDD.

Board EVDD/IVDD

Ω

0.1 µF

USB VDD Pin

10 µF

GND

SDVDD (2.5V/1.8V)

Supplies Stable

3.3V

2.5V

1.5V

Time

Notes:

IVDD should not exceed EVDD, SDVDD or PLLVDD by more than

0.4 V at any time, including power-up.

Recommended that IVDD/PLLVDD should track EVDD/SDVDD up to

0.9 V, then separate for completion of ramps.

Input voltage must not be greater than the supply voltage (EVDD, SDVDD,

IVDD, or PLLVDD) by more than 0.5 V at any time, including during power-up.

Use 1 ms or slower rise time for all supplies.

IVDD, PLLVDD

EVDD, SDVDD, USBVDD

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