MC145745FW Просмотр технического описания (PDF) - Motorola => Freescale

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MC145745FW

V.21/V.23 Telemeter Modem

Motorola => Freescale 

RxA

CDA

Vref

TxA2

TxA1

CLKO

BLOCK DIAGRAM

Rx AMP

AND AGC

CONTROL

LOOPBACK

PATH

ANTI–ALIAS

AND

LOW–PASS

FILTER

TONE

GENERATOR

SMOOTHING

–

FILTER

+

AND

Tx GAIN

CONTROL

CLOCK

GENERATOR

1/2

DTMF

RECEIVER

CPT

DETECTOR

FSK

CARRIER

DETECTOR

FSK V.21

MODEM

FSK V.23

MODEM

4

PB0 – PB3

TIMING

CONTROL

CD

CIRCUIT

TxD

RxD

RESET

X1 X2

ECLK TLA

VCC GND SCP Tx SCP Rx SCPEN SCPCLK

MC145745

2

MOTOROLA

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