CMX269AD3 データシートの表示（PDF） - MX-COM Inc
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CMX269AD3 Datasheet PDF : 18 Pages
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1200/2400/4800bps MSK Modem
14
6.1.4 Timing
6.1.4.1 1200bps
Characteristics
TX Enable to TX Sync Rise Time
TX Delay, Signal to Disable Time
Data Set-Up Time
Data Hold Time
TX Delay to O/P Time
TX Data Rate Period
RX Data Rate Period
Undetermined State
Internal RX Delay
tSYNC
tESET
tDSET
tDH
tTxD
tTDR
tRDR
tID
Note
1
Notes:
1. Consider the Xtal/clock tolerance.
2. All TX timings are related to the TX Sync Output.
TX
ENABLE
t SYNC
CMX469A PRELIMINARY INFORMATION
Min.
2.0
2.0
2.0
800
Typ.
416
1.2
833
1.5
Max.
800
865
2.0
Unit
µs
µs
µs
µs
µs
µs
µs
µs
ms
t ESET
TX
SYNC
TX DATA
DC = Don't Care
DV = Data Valid
t DSET
DC
DV
t DH
DC
t TXD
1200 BPS
TX OUTPUT
OPEN CIRCUIT
t TDR
t TDR
DV
DC
DV
DC
Figure 8: Transmitter Timing: 1200bps
OPEN CIRCUIT
RX
SIGNAL I/P
1200 BPS
1
RX
SYNC O/P
(1200Hz)
0
1
CLOCKED
DATA O/P
0
LOGIC '1'
LOGIC '0'
t ID
t RDR
Undetermined
State
LOGIC '1'
LOGIC '0'
Figure 9: Receiver Timing Diagram: 1200bps
©1999 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480191.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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