Dynamic Supply Voltage Control - Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual

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Dynamic Power Management Controller

Dynamic Supply Voltage Control

In addition to clock frequency control, the processor provides the capabil-

ity to run the core processor at different voltage levels. As power

dissipation is proportional to the voltage squared, significant power reduc-

tions can be accomplished when lower voltages are used.

The processor uses three power domains. These power domains are shown

20-7. Each power domain has a separate V

the internal logic of the processor and much of the processor I/O can be

run over a range of voltages. See the product data sheet for details on the

allowed voltage ranges for each power domain and power dissipation data.

Table 20-7. Power Domains

Power Domain

All internal logic except RTC

Real-Time Clock I/O and internal logic

All other I/O

Power Supply Management

The processor provides an on-chip switching regulator controller which,

with some external hardware, can generate internal voltage levels from the

20-3. This voltage level can be reduced to save power, depending

upon the needs of the system.

supply with an external power transistor as shown in

ADSP-BF537 Blackfin Processor Hardware Reference

supply. Note that