Changing Voltage - Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual

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Changing Voltage

Minor changes in operating voltage can be accommodated without requir-

ing special consideration or action by the application program. See the

processor data sheet for more information about voltage tolerances and

allowed rates of change.

Reducing the processor's operating voltage to greatly conserve

power or raising the operating voltage to greatly increase perfor-

mance will probably require significant changes to the operating

voltage level. To ensure predictable behavior when varying the

operating voltage, the processor should be brought to a known and

stable state before the operating voltage is modified.

The recommended procedure is to follow the PLL programming sequence

when varying the voltage. The four-bit voltage level (

the nominal internal voltage level. Please refer to the processor data sheet

for the applicable

lists the voltage level values for

Table 20-10. VLEV Encodings

ADSP-BF537 Blackfin Processor Hardware Reference

voltage range and associated voltage tolerances.

Dynamic Power Management

) field identifies