MX469D3 データシートの表示（PDF） - MX-COM Inc
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MX469D3 Datasheet PDF : 17 Pages
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1200/2400/4800bps MSK Modem
8
4.1.2 2400bps
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
Min.
2.0
2.0
2.0
400
Typ.
208
1.2
416
1.5
t ESET
Max.
400
433
2.0
MX469
Unit
µs
µs
µs
µs
µs
µs
µs
µs
ms
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
2400 BPS
TX OUTPUT
OPEN CIRCUIT
Figure 5: Transmitter Timing: 2400bps
LOGIC '1'
LOGIC '0'
LOGIC '1'
LOGIC '0'
RX
SIGNAL I/P
2400 BPS
1
RX
SYNC O/P
(2400Hz)
0
1
CLOCKED
DATA O/P
0
t ID
t RDR
Undetermined
State
LOGIC '1'
LOGIC '0' LOGIC '1' LOGIC '0'
Figure 6: Receiver Timing: 2400bps
1998 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480081.010
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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