Analog Devices ADSP-BF506F EZ-KIT Lite Manual page 36

VDDINT Programmable Regulator
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 1A for 5V and 500 mA for the 3.3V planes. If more current is required,
then a separate power connector and a regulator must be designed on a
daughter card. 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.
VDDINT Programmable Regulator
By default, the EZ-KIT Lite runs at 1.4V. The board contains a program-
mable regulator that supplies the processor's core with a voltage between
1.1 and 1.4. The voltage is adjusted by writing to the AD5258 digital
potentiometer via the 2-wire interface (TWI)
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/frequency values, refer to the
ADSP-BF504/BF504F/BF506F Blackfin Embedded Processor Data Sheet
and ADSP-BF50x Blackfin Processor Hardware Reference manual. For more
information about the digital potentiometer, refer to the AD5258 data
sheet.
1-16 ADSP-BF506F EZ-KIT Lite Evaluation System Manual
signals.Table 1-3 shows the