CMX624P4 データシートの表示（PDF） - MX-COM Inc

部品番号

コンポーネント説明

メーカー

CMX624P4

Bell 202 and V.23 Modem with Call Progress and DTMF

MX-COM Inc  

Bell 202 and V.23 Compatible Modem

9

CMX624 Preliminary Information

4.7 FSK Demodulator

The FSK Demodulator block is enabled when Bit 1 and Bit 5 of the FSK MODE Register are set to ‘1’. It

converts the 75bps, 150bps or 1200bps FSK input signal to a binary received data signal which is sent to the

Rx UART block.

Note: In the absence of a valid FSK signal, the demodulator may falsely interpret speech or other

extraneous signals as data.

FSK mode Register $E7

Bit 5

Bit 4

1

1

1

0

0

X

1

1

TX Tone Register $E1

Bit 0

0

0

0

1

RX MODE

RX FSK data at 1200 baud

Rx FSK data at 75/150 baud

RX Call progress Tones Detect

RX 2100Hz tone detect

Note: Other states are not defined and may result in unpredictable behavior

Table 4: Receive Mode

0

-10

dB -20

-30

1200bps

75/150 bps

Call Progress

-40

100

1000

Hz

Figure 7 Rx Frequency Responses with Line Interface

10000

©1999 MX-COM, Inc.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480180.108

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

Share Link: