Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual page 1066

Dynamic Power Management Controller
Table 20-8 lists the gain levels configured by
Table 20-8. GAIN Encodings
GAIN Value
00 5
01 10
10 20
11 50
The two-bit
FREQ
voltage regulator. A higher frequency setting allows for smaller switching
capacitor and inductor values, while potentially generating more EMI
(electromagnetic interference).
Table 20-9 lists the switching frequency values configured by
Table 20-9. FREQ Encodings
FREQ Value
00 Powerdown/Bypass onboard regulation
01 333 kHz
10 667 kHz
11 1MHz
To bypass onboard regulation, program a value of
field and leave the
20-20
field controls the switching oscillator frequency for the
pins floating.
VROUT
ADSP-BF537 Blackfin Processor Hardware Reference
.
GAIN[1:0]
FREQ[1:0]
in the
b#00
.
FREQ