User's Manual
AC65/AC75 Hardware Interface Description
Confidential / Preliminary
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AC65/AC75_hd_v00.372 Page 32 of 118 2006-08-03
3.3.1.3 Turn on AC65/AC75 Using the VCHARGE Signal
As detailed in Section 3.5.6, the charging adapter can be connected regardless of the
module’s operating mode.
If the charger is connected to the charger input of the external charging circuit and the
module’s VCHARGE pin while AC65/AC75 is off, and the battery voltage is above the
undervoltage lockout threshold, processor controlled fast charging starts (see Section 3.5.5).
AC65/AC75 enters a restricted mode, referred to as Charge-only mode where only the
charging algorithm will be launched.
During the Charge-only mode AC65/AC75 is neither logged on to the GSM network nor are
the serial interfaces fully accessible. To switch from Charge-only mode to Normal mode the
ignition line (IGT) must be pulled low for at least 2 seconds. When released, the IGT line
goes high and causes the module to enter the Normal mode. See also Section 3.5.6.
3.3.1.4 Reset AC65/AC75 via AT+CFUN Command
To reset and restart the AC65/AC75 module use the command AT+CFUN. You can enter
AT+CFUN=,1 or AT+CFUN=x,1, where x may be in the range from 0 to 9. See [1] for details.
If configured to a fix baud rate (AT+IPR0), the module will send the URC “^SYSSTART” or
“^SYSSTART AIRPLANE MODE” to notify that it is ready to operate. If autobauding is
enabled (AT+IPR=0) there will be no notification. To register to the network SIM PIN
authentication is necessary after restart.