Turning The G24 On Using Ign; Turning The G24 Off; Turning The G24 Off Using On_N - Motorola G24 Developer's Manual

Power On/Off Operation

Turning the G24 On Using IGN

The IGN input signal must be set low when not used. To turn on G24, this signal must be asserted
high. The IGN signal must remain high for the duration of the G24 operation. G24 powers down
when the IGN signal is returned to its low state.
Figure 2-5
Figure 2-5: IGN Power On Timing

Turning the G24 Off

There are several ways to turn the G24 off:
•
Asserting the ON_N signal low for a minimum of 2 seconds.
•
Setting the IGN signal low.
•
Low power automatic shut down.
•
AT command.

Turning the G24 Off Using ON_N

The ON_N signal is set high using an internal pull up resistor when power is applied to G24.
Asserting the ON_N signal low for a minimum of 2 seconds will turn G24 off. This will initiate a
normal power-off process, which includes disabling of all applications interfaces (UART, SIM
card, audio, etc.) and closing the network connection.
16
illustrates the power-on process using the IGN signal.
Module Hardware Description January 1, 2006