S9S12XS256J0CAL Datasheet, PDF(46/738 Page) Freescale Semiconductor, Inc – Microcontrollers

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S9S12XS256J0CAL Datasheet, PDF (46/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

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Device Overview S12XS Family

1.2.4.3 VDD, VSS2, VSS3 â Core Power Pins

The voltage supply of nominally 1.8 V is derived from the internal voltage regulator. The return current

path is through the VSS2 and VSS3 pins. No static external loading of these pins is permitted.

1.2.4.4 VDDF, VSS1 â NVM Power Pins

The voltage supply of nominally 2.8 V is derived from the internal voltage regulator. The return current

path is through the VSS1 pin. No static external loading of these pins is permitted.

1.2.4.5 VDDA, VSSA â Power Supply Pins for ATD and Voltage Regulator

These are the power supply and ground input pins for the analog-to-digital converters and the voltage

regulator.

1.2.4.6 VRH, VRL â ATD Reference Voltage Input Pins

VRH and VRL are the reference voltage input pins for the analog-to-digital converter.

1.2.4.7 VDDPLL, VSSPLL â Power Supply Pins for PLL

These pins provide operating voltage and ground for the oscillator and the phased-locked loop. The voltage

supply of nominally 1.8 V is derived from the internal voltage regulator. This allows the supply voltage to

the oscillator and PLL to be bypassed independently. This voltage is generated by the internal voltage

regulator. No static external loading of these pins is permitted.

Table 1-7. Power and Ground Connection Summary

Mnemonic

VDDR

VDDX[2:1]

VSSX[2:1]

VDDA

VSSA

VRL

VRH

VDD

VSS1, VSS2,

VSS3

VDDF

Nominal

Voltage

5.0 V

5.0 V

0V

5.0 V

0V

0V

5.0 V

1.8 V

0V

2.8 V

Description

External power supply to internal voltage

regulator

External power and ground, supply to pin

drivers

Operating voltage and ground for the

analog-to-digital converters and the

reference for the internal voltage regulator,

allows the supply voltage to the A/D to be

bypassed independently.

Reference voltages for the analog-to-digital

converter.

Internal power and ground generated by

internal regulator for the internal core.

Internal power and ground generated by

internal regulator for the internal NVM.

S12XS Family Reference Manual, Rev. 1.13

46

Freescale Semiconductor

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