S12ECT16B8CV2 datasheet(72/152 Pages) NXP

72 / 152 page

MC9S12XDP512 Device User Guide — 9S12XDP512DGV1/D V01.12

2.3 Detailed Signal Descriptions

2.3.1 EXTAL, XTAL — Oscillator Pins

EXTAL and XTAL are the crystal driver and external clock pins. On reset all the device clocks are derived

from the EXTAL input frequency. XTAL is the crystal output.

2.3.2 RESET — External Reset Pin

An active low bidirectional control signal, it acts as an input to initialize the MCU to a known start-up state,

and an output when an internal MCU function causes a reset.The RESET pin has an internal pullup device.

2.3.3 TEST — Test Pin

This input only pin is reserved for test. This pin has a pulldown device.

NOTE:

The TEST pin must be tied to VSS in all applications.

2.3.4 VREGEN — Voltage Regulator Enable Pin

This input only pin enables or disables the on-chip voltage regulator. The input has a pullup device.

PT[7:0]

IOC[7:0]

—

VDDX

PERT/

PPST

Disabled

Port T I/O, Timer channels

Pin Name

Funct. 1

Pin Name

Funct. 2

Pin Name

Funct. 3

Pin Name

Funct. 4

Pin Name

Funct. 5

Power

Supply

Internal Pull

Resistor

Description

CTRL

Reset

State

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

S12ECT16B8CV2 Datasheet(PDF) 72 Page - NXP Semiconductors

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