Quatech 802.11B/G Especificaciones descargar pdf (Pagina 25)

2 – Airborne Wireless LAN Node Module

100-8004-102G Airborne Wireless LAN Node Module Data Book

Page 19

Quatech, Inc. Confidential

2.8 AIRBORNE WLN MODULE OPERATION

2.8.1 Power-up

When the Module powers-up, it performs a Power On Self Test (POST). The POST procedure

checks that RAM, Flash memory, real-time clock, and radio are operating as expected. If the

Module passes the POST, the POST line is set high (POST). Any failures cause the Module to

reset.

2.8.2 Factory Reset

The Module provides a factory-reset function that returns the Module to its original factory

default settings. There are two ways to activate this feature:

 Use the CLI command reset (see CLI Reference Guide)

 Hold Port G3 low during Module startup.

To ensure proper operation, a resistor (4.7 K Ω to 47 K Ω) should be used to pull up Port G3 to

+2.5 V (use the Module’s 2.5 V reference). This signal can be pulled low using either a push-

button switch to GND or an open-drain output signal from the Host. For proper factory-reset

operation, Port G3 must be held low for 100 ms before /RESET goes high and kept low until

750 ms after /RESET goes high.

Caution

Port G3 must be tied high to no more than 2.5 V. Higher voltages may

cause latch-up or damage to the application processor.

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Quatech 802.11B/G Especificaciones Pagina 25