Power Up Channel; Power Up Logic; Power Off Logic - Motorola GM300 Series Selling Manual

Features
4.4

Power Up Channel

The radio can be programmed to power up on a pre-defined channel or the last used channel.
Benefits
Designated Power Up Channel avoids missing first messages


4.5

Power Up Logic

The radio can be powered up by:
Pressing the on/off switch;


Asserting the ignition line (GPIO pin 10). If ignition sense is enabled on the radio and the


vehicle's ignition is connected to the accessory connector, the radio will automatically turn
on whenever the vehicle ignition is turned on;
Asserting the emergency wake up line (GPIO pin 9). If emergency with wake up is enabled


on the radio and an emergency switch is connected to the accessory connector, the radio
automatically turns on in emergency mode whenever the emergency switch is pressed.
Emergency wake up takes priority over the other power up mode.
Benefits
Ignition power up caters for users where auto power-up is required, for example, Fire Engines.


4.6

Power Off Logic

The ability to turn the radio off is dependant on:
Its turn on method


The state of the ignition line


Whether "ignition override" is enabled


Whether it is in emergency mode


Whether "ON/OFF in emergency" is enabled


If the radio is turned ON via the ON/OFF switch, it can only be turned OFF via the ON/OFF switch.
However, if Ignition Override is enabled, the ignition line must be de-asserted (ie the vehicle turned
off) before the radio can be turned off via the ON/OFF switch.
If the radio is turned ON via the ignition, it can be turned OFF via the ignition or the ON/OFF switch.
However, if Ignition Override is enabled, the radio can only be turned off via the ignition.
If the radio is turned on via the emergency wake up, and ON/OFF in emergency is disabled, the
radio cannot be turned OFF.
If the radio is turned on via the emergency wake up, and ON/OFF in emergency is enabled, the
radio will follow the turn OFF rules as if it had been turned ON via the ON/OFF switch.
The Power OFF logic is shown in the tables below:
2-7