User's Manual

Cinterion
®
ALAS6A-US Hardware Interface Overview
2.1 Application Interface
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 ALAS6A-US_HIO_v00.130a 2016-09-28
Confidential / Preliminary
Page 14 of 40
2.1.6 Control Signals
2.1.6.1 PWR_IND Signal
PWR_IND notifies the on/off state of the module. High state of PWR_IND indicates that the
module is switched off. The state of PWR_IND immediately changes to low when IGT is pulled
low. For state detection an external pull-up resistor is required.
2.1.6.2 Behavior of the RING0 Line
The RING0 line serves to indicate incoming calls and other types of URCs (Unsolicited Result
Code).
The RING0 line behavior and usage can be configured by AT command. For details see [1]:
AT^SCFG.
2.1.6.3 Low Current Indicator
A low current indication is optionally available over a GPIO line. By default, low current indica-
tion is disabled and the GPIO pads can be configured and employed as usual.
For a GPIO pad to work as a low current indicator the feature has to be enabled by AT com-
mand (see [1]: AT^SCFG: MEopMode/PowerMgmt/LCI). By default, the GPIO6 pad is config-
ured as LCI_IND signal.
If enabled, the GPIOx/LCI_IND signal is high when the module is sleeping.
2.1.6.4 Remote Wakeup
If no call, data or message transfer is in progress, the external host application may shut down
its own module interfaces or other components in order to save power. If a call, data, or other
request (URC) arrives, the external application can be notified of this event and be woken up
again by a state transition of a configurable remote wakeup line. Available as remote wakeup
lines are all GPIO signals as well as the RING0 line. Please refer to [1]: AT^SCFG: "Re-
moteWakeUp/..." for details on how to configure these lines for defined wakeup events on
specified device interfaces.