ADP1864AUJZ-R7 datasheet(32/75 Pages) AD

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VDDINT Programmable Regulator

1-12

ADSP-BF506F EZ-KIT Lite Evaluation System Manual

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) signals.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/frequency values, refer to the

ADSP-BF604/BF506(F) 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.

Power Measurements

Several locations are provided for measuring the current draw from vari-

ous power planes. Precision 0.1 ohm shunt resistors are available on the

VDDINT, VDDEXT, and VDDFLASH voltage domains. For current

draw, the jumper is removed, voltage across the resistor can be measured

Table 1-3. Table 5. Voltage Values

Step Value

Voltage (V)

1.10

1.15

1.20

1.25

1.30

1.35

31.40

ADP1864AUJZ-R7 Datasheet(PDF) 32 Page - Analog Devices