Rainbow-electronics MAX13237E Manuel d'utilisateur télécharger pdf (Page 11)

MAX13234E–MAX13237E

3Mbps RS-232 Transceivers with

Low-Voltage Interface

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Table 1. Transceiver Mode Control

FORCEOFF

FORCEON

R_IN or T_IN

EDGE WITHIN 30s

T_OUT R_OUT TRANSCEIVER STATUS

0X 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

10 No

High-Impedance

Active Shutdown in AutoShutdown Plus

X = Don’t Care.

R_IN

T_IN

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

1 2 ... 6 7 8 9 10 11 12 13 14 15 16

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Rainbow-electronics MAX13237E Manuel d'utilisateur Page 11