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
16
6.1.4.3 4800bps
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
200
Typ.
104
1.2
208
1.0
Max.
200
216
2.0
Unit
µs
µs
µs
µs
µs
µs
µs
µs
ms
t ESET
TX
SYNC
t DH
t DSET
t TDR
t TDR
TX DATA DC = Don't Care DC DV DC DV DC DV DC DV DC DV DC DV DC
DV = Data Valid
t TXD
OPEN CIRCUIT
4800 BPS
TX OUTPUT
OPEN CIRCUIT
Figure 12: Transmitter Timing: 4800bps
LOGIC '1'
LOGIC '0'
LOGIC '1'
LOGIC '0'
RX
SIGNAL I/P
4800 BPS
1
RX
SYNC O/P
(4800Hz)
0
1
CLOCKED
DATA O/P
0
t ID
t RDR
Undetermined
State
LOGIC '1'
LOGIC '0' LOGIC '1' LOGIC '0'
Figure 13: Receiver Timing: 4800bps
©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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