Motorola Mobility LLC T56KT1 User Manual
Power On/Off Operation
16
G30 - Module Hardware Description
December 15, 2009
Figure 2-3: Power Supply Turn-on
Turning the G30 On Using PWR_ON
The PWR_ON input signal is set high by an internal pull-up resistor whenever a power supply is
applied to G30. Therefore, it is recommended to operate this signal using an open collector/drain
circuit connection.
applied to G30. Therefore, it is recommended to operate this signal using an open collector/drain
circuit connection.
Asserting the PWR_ON signal low for a minimum of 600 milliseconds (0.6 seconds) and a
maximum of 1.5 seconds will cause the G30 to turn-on.
maximum of 1.5 seconds will cause the G30 to turn-on.
Asserting the PWR_ON signal low for more than 1.5 seconds may cause the G30 to interpret the
signal as a power-off command, and turn off immediately after turning on.
signal as a power-off command, and turn off immediately after turning on.
illustrates the power-on process using the PWR_ON signal.
Figure 2-4: PWR_ON Power On Timing
Turning the G30 Off
There are several ways to turn the G30 off:
•
Asserting the PWR_ON signal low for a minimum of 3 seconds.
•
Low power automatic shut down.
•
AT command.