S12ECT16B8CV2 datasheet(110/152 Pages) NXP

110 / 152 page

MC9S12XDP512 Device User Guide — V01.12

The VDDX, VSSX, VDDR and VSSR pairs supply the I/O pins, VDDR supplies also the internal voltage

regulator.

VDD1, VSS1, VDD2 and VSS2 are the supply pins for the digital logic, VDDPLL, VSSPLL supply the

oscillator and the PLL.

VSS1 and VSS2 are internally connected by metal.

VDDA, VDDX, VDDR as well as VSSA, VSSX, VSSR are connected by anti-parallel diodes for ESD

protection.

NOTE:

In the following context VDD5 is used for either VDDA, VDDR and VDDX; VSS5

is used for either VSSA, VSSR and VSSX unless otherwise noted.

IDD5 denotes the sum of the currents flowing into the VDDA, VDDX and VDDR

pins.

VDD is used for VDD1, VDD2 and VDDPLL, VSS is used for VSS1, VSS2 and

VSSPLL.

IDD is used for the sum of the currents flowing into VDD1 and VDD2.

A.1.3 Pins

There are four groups of functional pins.

A.1.3.1 5V I/O pins

Those I/O pins have a nominal level of 5V. This class of pins is comprised of all port I/O pins, the analog

inputs, BKGD and the RESET pins.The internal structure of all those pins is identical, however some of

the functionality may be disabled. E.g. for the analog inputs the output drivers, pull-up and pull-down

resistors are disabled permanently.

A.1.3.2 Analog Reference

This group is made up by the VRH and VRL pins.

A.1.3.3 Oscillator

The pins XFC, EXTAL, XTAL dedicated to the oscillator have a nominal 2.5V level. They are supplied

by VDDPLL.

A.1.3.4 TEST

This pin is used for production testing only.

A.1.3.5 VREGEN

This pin is used to enable the on chip voltage regulator.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

S12ECT16B8CV2 Datasheet(PDF) 110 Page - NXP Semiconductors