CMX602A データシートの表示（PDF） - MX-COM Inc

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CMX602A

Calling Line Identifier/Calling Line Identifier on Call Waiting

MX-COM Inc  

Calling Line Identifier/Calling Line Identifier on Call Waiting 9

Output of FSK Demod:

IRQ output:

RXCLK input:

RXD output:

Received Character 'n'

START 1

2

3

4

5

6

CMX602A PRELIMINARY INFORMATION

7

8 STOP

1

8

IRQ

RXCLK

tD

RXD

tD

tCLO

tCHI

tD

Data Bit 1

Data Bit 2

Retimed data bits from

received character 'n'

tD = Internal CMX602A delay (max 1PS); tCLO = RXCLK low time (min 1PS); tCHI = RXCLK high time (min 1PS)

Figure 7: FSK Operation with Data Retiming

Note: If enabled, the Data Retiming block will interpret the FSK Channel Seizure signal (a sequence of

alternating mark and space bits) as valid received characters, with values of 55 (hex). Similarly it may

interpret speech or other signals as random characters.

4.7 FSK Data Without Retiming

If the Data Retiming facility is not required, the RXCLK input to the CMX602A should continuously be kept

high. The asynchronous data from the FSK Demodulator is then connected directly to the RXD output pin

and the IRQ output will not be activated by the FSK signal. This case is illustrated in Figure 8.

FSK Demod output:

RXD output:

Received Character 'n'

START 1

2

3

4

5

6

7

8 STOP

START 1

2

3

4

5

6

7

8 STOP

Figure 8: FSK Operation without Data Retiming (RXCLK always high)

¤1999 MX-COM, Inc

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

Doc. # 20480169.004

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