Turning The C24 Off Using Ign; On_N Power Off Timing; Ign Power Off Timing - Motorola 8900 - Blackberry Curve Cell Phone OEM Car Charger Developer's Manual

Power On/Off Operation
Figure 2-4
Figure 2-4: ON_N Power Off Timing

Turning the C24 Off Using IGN

The IGN signal may be used to power off C24 only if it was also used to power it on. When the
IGN signal is set low, C24 will turn off. This will initiate a normal power-off process, which
includes disabling of all applications interfaces (UART, audio, etc.) and closing the network
connection.
The IGN signal will not power off C24 before 30 seconds have elapsed since C24 was
powered-on. This delay mechanism is implemented to protect C24 from unexpected transients on
the IGN line during power up.
Figure 2-5
Figure 2-5: IGN Power Off Timing
14
illustrates the power-off timings when using the ON_N signal.
illustrates the power-off timings when using the IGN signal.
C24 Module Hardware Description December 15, 2008