Table 1. transceiver mode control – Rainbow Electronics MAX13237E User Manual
Page 11
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MAX13234E–MAX13237E
3Mbps RS-232 Transceivers with
Low-Voltage Interface
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11
Table 1. Transceiver Mode Control
FORCEOFF
FORCEON
R_IN or T_IN
EDGE WITHIN 30s
T_OUT
R_OUT
TRANSCEIVER STATUS
0
X
X
High-Impedance
Active
Shutdown (Forced Off)
1
1
X
Active
Active
Normal Operation (Forced On)
1
0
Yes
Active
Active
Normal Operation in AutoShutdown Plus
1
0
No
High-Impedance
Active
Shutdown in AutoShutdown Plus
X = Don’t Care.
R_IN
T_IN
R
S
30s
TIMER
EDGE
DETECT
EDGE
DETECT
FORCEOFF
FORCEON
POWERDOWN*
AUTOSHDN
FORCEOFF
FORCEON
* POWERDOWN IS ONLY AN INTERNAL SIGNAL.
IT CONTROLS THE OPERATIONAL STATUS OF
THE TRANSMITTERS AND THE POWER SUPPLIES.
Figure 6. AutoShutdown Plus and Shutdown Logic
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