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Hardware Integration Guide
6.3.2.
Software-Initiated Power Down
The host application may choose to use the AT Command AT!POWERDOWN to initiate a power
down of the AirPrime AR7558 device instead of using an OFF pulse. In this scenario the ON/OFF
signal should be left open by the application. The AirPrime AR7558 device will initiate a power up
after completion of the power down if ON/OFF is low.
6.3.3.
Deep Sleep
The AirPrime AR7558 embedded modules support a low power mode in which the device is
registered on the LTE/CDMA/GSM/WCDMA network and sleeps in between wake intervals where it
listens for pages.
Figure 12.
Power Mode Diagram
The following table lists the parameter that defines the wake interval period for the various devices.
Table 38.
Period of Wake Intervals
AR Series Device
AR7558
The average current consumption of the AirPrime AR7558 while in this mode is defined in the Sleep
Mode portion of the current consumption tables in section 5.4 Current Consumption.
The Slot Cycle Index is the lower of the values stored in the AirPrime AR7558 or the value being
broadcast by the wireless network that the AirPrime AR7558 is registered on.
The MFRM and DRX cycle index values are broadcast by the wireless network on which the AirPrime
AR7558 embedded module is registered.
While in Deep Sleep mode the functions of the AirPrime AR7558 are limited as defined in the
following table.
Table 39.
Deep Sleep Function Availability
Function
Paging
4116922
Network Standard
CDMA
WCDMA
LTE
Availability
Rev 1.1
Parameter
SCI
DRX
DRX
Conditions
January 21, 2015
Baseband Specification
34
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