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

Turning the C24 On Using IGN

To turn on C24, the IGN signal must be asserted high. The IGN signal must remain high for the
duration of the C24 operation. C24 powers down when the IGN signal is returned to its low state.
Figure 2-3
Figure 2-3: IGN Power On Timing

Turning the C24 Off

There are several ways to turn the C24 off:
Asserting the ON_N signal low for a minimum of 2 seconds.
•
Setting the IGN signal low.
•
AT command.
•

Turning the C24 Off Using ON_N

Asserting the ON_N signal low for a minimum of 2 seconds will turn C24 off. This will initiate a
normal power-off process, which includes disabling of all applications interfaces (UART, audio,
etc.) and closing the network connection.
December 15, 2008
illustrates the power-on process using the IGN signal.
C24 Module Hardware Description
Chapter 2: Hardware Interface Description
13