MC68HC908AP16CFB datasheet(30/440 Pages) MOTOROLA

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General Description

Data Sheet

MC68HC908AP Family — Rev. 2.5

MOTOROLA

1.5 Pin Functions

Description of the pin functions are provided in Table 1-2.

Table 1-2. Pin Functions

PIN NAME

PIN DESCRIPTION

IN/OUT

VOLTAGE

LEVEL

VDD

Power supply.

4.5 to 5.5

2.7 to 3.3

VSS

Power supply ground.

Out

0 V

VDDA

Power supply for analog circuits.

VDD

VSSA

Power supply ground for analog circuits.

Out

VSS

VREFH

ADC input reference high.

VDDA

VREFL

ADC input reference low.

Out

VSSA

VREG

Internal (2.5V) regulator output.

Require external capacitors for decoupling.

Out

2.5V(1)

RST

Reset input, active low; with internal pullup and schmitt

trigger input.

VDD

IRQ1

External IRQ1 pin; with internal pullup and schmitt trigger

input.

VDD

Used for mode entry selection.

VDD to VTST

OSC1

Crystal or RC oscillator input.

VREG

OSC2

Crystal OSC option: crystal oscillator output; inverted

OSC1.

Out

VREG

RC OSC option: bus clock output.

Out

VREG

Internal OSC option: bus clock output.

Out

VREG

CGMXFC

CGM external filter capacitor connection.

In/Out

Analog

PTA0/ADC0

PTA7/ADC7

8-bit general purpose I/O port.

In/Out

VDD

Pins as ADC inputs, ADC0–ADC7.

VREFH

Each pin has high current sink for LED.

Out

VDD

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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