Chapter 2: Hardware Interface Description
January 1, 2006 Module Hardware Description 17
Figure 2-6 illustrates the power-off timings when using the ON_N signal.
Figure 2-6: ON_N Power Off Timing
Turning the G24 Off Using IGN
The IGN signal may be used to power off G24 only if it was also used to power it on. When the
IGN signal is set low, G24 will turn 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.
The IGN signal will not power off G24 before 30 seconds have elapsed since G24 was
powered-on. This delay mechanism is implemented to protect G24 from unexpected transients on
the IGN line during power up, particularly when applying vehicle cranking waveforms.
Figure 2-7 illustrates the power-off timings when using the IGN signal.
Figure 2-7: IGN Power Off Timing
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