Freescale Semiconductor Starter Kit for MC9S12G TRK-USB-S12G128 TRK-USB-S12G128 Ficha De Dados

Freescale Semiconductor

1193

The VDDF, VSS1 pin pair supplies the internal NVM logic.

All VDDX pins are internally connected by metal.

All VSSX pins are internally connected by metal.

VDDA, VDDX and VSSA, VSSX are connected by diodes for ESD protection.

In the following context V

DD35

 is used for either VDDA, VDDR, and

VDDX; V

SS35

 is used for either VSSA and VSSX unless otherwise noted.

I

DD35

denotes the sum of the currents flowing into the VDDA, VDDX and

VDDR pins.

There are four groups of functional pins.

The I/O pins have a level in the range of 3.13V to 5.5V. This class of pins is comprised of all port I/O pins,
the analog inputs, BKGD and the RESET pins. Some functionality may be disabled.

This group consists of the VRH pin.

The pins EXTAL, XTAL dedicated to the oscillator have a nominal 1.8V level.

This pin is used for production testing only. The TEST pin must be tied to ground in all applications.

Power supply must maintain regulation within operating V

DD35

 or V

DD

 range during instantaneous and

operating maximum current conditions. If positive injection current (V

in

 > V

DD35

) is greater than I

DD35

,

the injection current may flow out of V

DD35

 and could result in external power supply going out of

regulation. Ensure external V

DD35

 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.