MC9S12T64 Datasheet, PDF (563/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Electrical Characteristics
General
Current Injection
Power supply must maintain regulation within operating V_DD5 or V_DD
range during instantaneous and operating maximum current conditions.
If positive injection current (V_in > V_DD5) is greater than I_DD5, the injection
current may flow out of VDD5 and could result in external power supply
going out of regulation. Ensure external VDD5 load will shunt current
greater than maximum injection current. This will be the greatest risk
when the MCU is not consuming power; e.g. if no system clock is
present, or if clock rate is very low which would reduce overall power
consumption.
Absolute
Maximum Ratings
Absolute maximum ratings are stress ratings only. A functional operation
under or outside those maxima is not guaranteed. Stress beyond those
limits may affect the reliability or cause permanent damage of the
device.
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
Electrical Characteristics
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MC9S12T64Revision 1.1.1