Sierra Wireless AirLink FXT Series, Руководство пользователя, Страница: 38 / 136

WA_DEV_FEX20_UGD_002 Rev 002 April 26, 2010 38
Fastrack Xtend User Guide Interfaces
5.1.1.2. ON/OFF Pin
The Fastrack Xtend has an external ON/OFF pin which is used to turn the device ON or OFF. The
following table describes the operation of this pin.
Table 10: ON/OFF Pin Operation
Condition State Power Supply Operation
1 Open When 4.75V to 32V supply is
applied. The Fastrack Xtend is turned ON.
2 Pulled to GND When 4.75V to 32V supply is
applied. The Fastrack Xtend remains OFF.
3 Left open when turning
ON the Fastrack
Xtend, then pulled to
GND 4.75V to 32V supply is initially
applied. The Fastrack Xtend remains ON and
will remain ON until
AT+CPOF is sent
to turn the device OFF.
To enable the low power mode, the user may simply pull the ON/OFF pin to GND and send
AT+CPOF to the Fastrack Xtend using a communication software such as a HyperTerminal.
Table 11: ON/OFF Pin Description
Pin # Signal I/O I/O Voltage Description
8 ON/OFF I 4V Pin to turn the Fastrack Xtend ON/OFF.
Refer to the power consumption tables in section 12 Power Consumption for the power consumption
values when the Fastrack Xtend is in Alarm mode (Low Power mode).
5.1.2. Serial Interface
A SUB-D 15-pin connector is available as a serial interface to directly communicate with the Fastrack
Xtend. This serial interface is used for:

RS232 serial link connection

Audio lines connection (microphone and speaker)

BOOT signal connection

RESET signal connection
Figure 8. 15-Pin Serial Connector
Refer to the following table for the pin description of the 15-pin serial connector.