MC68181 Ver la hoja de datos (PDF) - Freescale Semiconductor

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Fabricante

MC68181

ROAMING FLEX™ chip SIGNAL PROCESSOR

Freescale Semiconductor 

MC68181

Power Input and Monitoring

Freescale Semiconductor, Inc.

MC68181

VDD

VSS

2

4

LOBAT

Power:

Input power

Ground

Low Battery

Detect

Current

Symbol MSB

Current

Symbol LSB

EXTS1

EXTS0

CLKOUT

SYMCLK

EXTAL

XTAL

OSCPD

RESET

38.4 kHz

Symbol Clock

External input

External output

Oscillator Power

Down

Serial

Peripheral

Interface

(SPI)

SCK

SS

MOSI

MISO

READY

Hardware

Reset

Receiver 8 S0–S7

Control Port

Figure 1-1 Signals Identified by Functional Group

AA122

POWER INPUT AND MONITORING

Power Name

VDD

VSS

LOBAT

Table 1-2 Power Input, Monitoring, and Control Signals

Description

Power—VDD is the input power for the IC.

Ground—VSS is ground connection for the IC.

Low Battery—LOBAT provides an input signal to indicate to the IC when external

battery power is going low. (An external voltage sensing circuit is required)

1-2

MC68181 Technical Data Sheet

MOTOROLA

For More Information On This Product,

Go to: www.freescale.com

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