MSM7512 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7512

1200 bps Half Duplex FSK Modem – ITU-T V.23

Oki Electric Industry 

Semiconductor

OPERATION MODE

MOD2

0

0

1

1

MOD1

0

1

0

1

Table 1 Operation Mode

Mode

FSK Transmit Mode (Fig.2)

FSK Receive & 75 bps Transmit Mode (Fig.3)

Analog Loop Back Test Mode (Fig. 4)

Power Down Mode

MSM7512B

AI

Phone

Line

AO

Receive Filter

SG

Transmit Filter

Demodulator

Modulator

RD

VDD

DTE

XD

Figure 2 FSK Transmit Mode

AI

Phone

Line

AO

Receive Filter

Transmit Filter

Demodulator

Modulator

Figure 3 FSK Receive Mode

RD

DTE

XD

AI

Phone

Line

AO

SG

Receive Filter

Transmit Filter

Demodulator

Modulator

Figure 4 Analog Loop Back Test Mode

RD

DTE

XD

8/12

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