Analog Devices ADSP-BF592 EZ-KIT Lite, Руководство пользователя

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VDDINT Programmable Regulator
1-16 ADSP-BF592 EZ-KIT Lite Evaluation System Manual
An ADP2291 lithium ion battery charger IC charges the 950 mAh bat-
tery. The charge rate is selected by a jumper. See
Table 1-2 for details.
The lithium battery is monitored by the BQ27500 fuel gauge (
U17
). All
battery statistics can be read from the fuel gauge, including time to empty,
current voltage, and current consumption rate. To access the fuel gauge,
use the I
2
C interface: ensure that
SW6
has all positions
ON
. For more infor-
mation, see “Fuel Gauge Enable Switch (SW6)” on page 2-8 .
VDDINT Programmable Regulator
By default, the ADSP-BF592 processor’s core runs at 1.4V. The EZ-KIT
Lite board contains a programmable regulator that supplies the processor’s
core with a voltage between 1.1 and 1.4. The voltage is adjusted by writ-
ing to the AD5258 digital potentiometer via the TWI.
Table 1-3 shows the appropriate step and corresponding voltage values.
For an example of writing to the AD5258 potentiometer, refer to the
POST example. For more information on the acceptable voltage/fre-
quency values, refer to the ADSP-BF592 Blackfin Embedded Processor data
sheet and ADSP-BF59x Blackfin Processor Hardware Reference Manual. For
more information about the digital potentiometer, refer to the AD5258
data sheet.
Table 1-2. Charge Rate Selection
Mode JP6 Jumper JP8 Jumper Charge Rate
Charge 2 and 3
OFF
250 mA
Shutdown
OFF ON
None
Control Shutdown 1 and 2
ON
None/250 mA