MPC8275VR datasheet(8/76 Pages) MOTOROLA

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MPC8280 PowerQUICC II™ Family Hardware Speciﬁcations

MOTOROLA

DC Electrical Characteristics

NOTE: Core, PLL, and I/O Supply Voltages

After power up sequence is complete, VDDH and VDD/VCCSYN must

track each other and both voltages must vary in the same direction. When

varying in the positive direction, VDDH may vary up to 5% from nominal

or 3.3 + 0.165 = 3.465 V, in which case VDD/VCCSYN must also vary

upward by 5% from nominal or 1.525 + 0.075 = 1.6 V. The same applies

to the negative direction: VDDH may vary downward up to -5% from

nominal or 3.3 –0.165 = 3.135 V, in which case VDD/VCCSYN must vary

downward by-5% from nominal or 1.525 –0.075 = 1.45 V. A/C timing

speciﬁcation violation may occur during the time that voltage tracking is

not correct.

This device contains circuitry protecting against damage due to high static voltage or electrical ﬁelds;

however, it is advised that normal precautions be taken to avoid application of any voltages higher than

maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused

inputs are tied to an appropriate logic voltage level (either GND or VCC).

Figure 2 shows the undershoot and overshoot voltage of the 60x and local bus memory interface of the

MPC8280. Note that in PCI mode the I/O interface is different.

Figure 2. Overshoot/Undershoot Voltage

DC Electrical Characteristics

Table 5 shows DC electrical characteristics.

2 Note that for extended temperature parts the range is (-40)

– 105Tj.

Table 5. DC Electrical Characteristics1

Characteristic

Symbol

Min

Max

Unit

Input high voltage—

all inputs except TRST and PORESET2

VIH

2.0

3.465

Input low voltage

VIL

GND

0.8

CLKIN input high voltage

VIHC

2.4

3.465

CLKIN input low voltage

VILC

GND

0.4

Input leakage current, VIN = VDDH

IIN

—10

µA

GND

GND – 0.3 V

GND – 1.0 V

Not to exceed 10%

GVDD

of tSDRAM_CLK

GVDD + 5%

4 V

VIH

VIL

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