ADSP-BF526 EZ-Board Evaluation System Manual
1-31
Using The ADSP-BF526 EZ-Board
The 3.3V power for the board is regulated by an ADP2105 converter
(
VR2
).
The 1.8V power for the audio ADI SSM2603 audio codec (
U31
) is regu-
lated by an ADP1205 device (
VR1
).
The expansion interface II is equipped with three voltage domains: 5V,
3.3V, and 1.8V. The 1.8V and 3.3V are provided directly through the
VR2
and
VR3
regulators. The 5V is sourced from the wall adaptor when jumper
JP8
is set to positions 1, 2 and 3, 4, and
JP9
is
ON
. The 5V also can be pro-
vided by the on-board ADP1611 converter when using the lithium ion
battery. To set up the ADP1611 converter (
VR7
), install jumpers on posi-
tions 5, 6 and 7, 8 of
JP8
and ensure
JP9
is
OFF
.
To write to the OTP memory inside the processor, turn
SW20.2
OFF
,
SW20.5
ON
, and
SW20.6
OFF
. Also install a jumper on
JP16
. Now the
PG13
flag pin of the processor, when driven high, provides a precise 7.0V for
OTP writes. Ensure that the
PG13
flag pin is driven low when not writing
to the OTP memory: there is a limited amount of time that the OTP cir-
cuit can be supplied 7V. Refer to the
ADSP-BF522/523/524/525/526/527
Blackfin Embedded Processor Data Sheet
for more information.
Table 1-3. Voltage Values
Step Value
Voltage (V)
57
1.10
46
1.15
36
1.20
27
1.25
18
1.30
10
1.35
3
1.40
