CMX654D4 データシートの表示（PDF） - MX-COM Inc

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CMX654D4

V.23 TRANSMIT MODULATOR

MX-COM Inc  

V.23 Transmit Modulator

11

6.2 Timing

Data and Mode Timing

Delay to reliable data at TXOUT after ZP to Tx mode change

Data Retiming Disabled (reference Figure 6)

Tx Data Delay (TXD to TXOUT)

Data Retiming Enabled (reference Figure 7)

tD = Internal CMX654 delay

tcHI = CLK High time

tR = RDY low to CLK going low

tS = Data Set-up time

tH = Data Hold time

CMX654 PRELIMINARY INFORMATION

Min.

1

1

1

Typ.

Max. Units

20.0 ms

0.1

ms

1

Ps

Ps

800

Ps

Ps

Ps

TXOUT (FSK Signal)

F F LO

HI

FLO

FHI

TXD

Tx Data Delay

Note: M0 and M1 are preset and stable. FLO and FHI are the two FSK signaling frequencies.

Figure 6: TXD to TXOUT Delay time

FSK Modulator input

RDY

CLK

TXD

123

tR

12

34

RDY

CLK

TXD

tD

tcHI

tS

tH

1

Figure 7: FSK Operation with Tx Data Retiming

¤1998 MX-COM, Inc.

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

Doc. # 20480186.001

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All Trademarks and Service marks are held by their respective companies.

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