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Power Architecture
Limits to current and interface speed must be taken into consideration
when using the expansion interface. Current for the expansion interface II
is sourced from the EZ-KIT Lite; therefore, the current should be limited
to 200 mA for 5V and 300 mA for the 3.3V planes. A separate power con-
nector and a regulator must be designed on a daughter card if more
current is required. Additional circuitry can add extra loading to signals,
decreasing their maximum effective speed.
Analog Devices does not support and is not responsible for the
effects of additional circuitry.
Power Architecture
The ADSP-BF592 EZ-KIT Lite has three primary voltage sources: a lith-
ium ion battery (not included), a 5V wall adaptor, and
a USB cable. There is an OR'ing circuit, which allows the board to draw
power from any supply source that has the highest voltage potential.
The lithium ion battery leads are inserted into connector
switch connects the battery to the EZ-KIT Lite when the switch is
change the battery, press in the white tabs and slide out the battery lead.
For more information, see
An ADP2291 lithium ion battery charger IC charges the 950 mAh bat-
tery. The charge rate is selected by a jumper. See
The lithium battery is monitored by the BQ27500 fuel gauge (
battery statistics can be read from the fuel gauge, including time to empty,
current voltage, and current consumption rate. To access the fuel gauge,
1-12
"Battery Switch (SW3)" on page
ADSP-BF592 EZ-KIT Lite Evaluation System Manual
supplied over
VBUS
. The
P3
SW3
ON
2-7.
Table 1-2
for details.
). All
U17
. To
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