Datalogic ELF User Manual

USE AND FUNCTIONING
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4.11 RADIO POWER MANAGEMENT
The Elf's power management allows the user to keep device features powered while
the device is off. The features managed by this feature are: Cellular Data/Voice and
GPS.
The Wi-Fi driver has been measured to consume about 50 µA when
left powered. As a result, Wi-Fi will always be left powered during
suspend. This has the positive effect of substantially reducing the
time required for Wi-Fi to fully resume when the device is powered
back on.
NOTE
When the device is powered off, certain features (such as cellular communications
and GPS) will remain powered if enabled prior to the device powering off. The
behavior of each feature left powered during suspend is as follows:
− Power is not removed from the radio.
− The cellular radio can act as a wakeup source for the CPU. When the CPU
wakes up, the device continues to appear "off", but the device driver running in
the CPU can interact with the radio.
− Depending on what activity takes place, any feature can optionally decide to
change the system power state from Suspend to On. This would appear to the
user as a wakeup event.
If the user releases the power key in the next 1.5 seconds, the system completes the
shutdown of the CPU and device features will remain powered. If instead the user
continues to hold down the power key for a total of at least two seconds, then the
following pop-up dialog will be displayed:
The user is given five seconds to respond. If the user selects "Yes", then the device,
the cellular radio and GPS receiver are powered off. If the user selects "No", or does
not respond within five seconds, the device will power off, but leave radios running as
they were.

Datalogic ELF Specifications

General

Display diagonal	3.5 \
Display resolution	640 x 480 pixels
Display number of colors	65536 colors
Internal memory	0.256 GB
Internal memory type	-
Compatible memory cards	SD, SDHC
Built-in processor	PXA310
Processor frequency	0.624 GHz
Product color	Black
Phone function	No
Keyboard layout	Numeric
Image formats supported	BMP, JPG
Bundled software	Windows Mobile 6.5 + Mobile tools: Outlook, Word Mobile, Excel Mobile, PowerPoint Mobile, One Note Mobile & Internet Explorer Mobile 6.0
Data network	EDGE, GPRS, GSM, HSDPA
Bluetooth version	2.0+EDR
GSM bands supported	850, 900, 1800, 1900 MHz
Operating frequency	2400 - 5200 MHz
Wireless technology	WiFi
Rear camera resolution (numeric)	3 MP
Power supply	11.10 W
Power requirements	3.7V
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	-10 - 50 °C
Key benefits	27

Weight and Dimensions

Depth	42 mm
Width	157 mm
Height	81 mm
Weight	415 g