> 2.20.3 | Restart via Ignition / Key 7

> This section comprises the subsections Description, Used AT Commands, Flow Chart, Hints and Example. To move to these subsections please use the Navigation Frame or the appropriate buttons on the toolbar.

> 2.20.3.1 | Description

> When the ME is in POWER DOWN mode or switched off, it can be restarted to normal operation when the corresponding hardware pin is tied to ground for at least 100ms. Depending on the type of module, this is either the /IGT pin or the KEY7 pin. If the ME is in Charge-only mode the pin needs to be tied to ground for 1s. See also [1].

> 2.20.3.2 | Used AT commands

> Not applicable.

> 2.20.3.3 | Flow chart

> Not applicable.

> 2.20.3.4 | Hints

> Not applicable.

> 2.20.3.5 | Example

> In some applications without battery it may be useful to switch on the module immediately after applying battery power. Figure 181 shows a sample circuit which considers the timing conditions of /IGT with respect to BATT+ as specified in [1].
> BATT+ (or VBATT+) is the main power supply of the module. The capacitors and resistors form a special delay line. The transistor forms a digital pulse for /IGT.
> Autoignition can be used for automatic switch-on after applying power.
> Figure 180: Autoignition