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Software-Controlled Switches (SoftConfig)
the EZ-KIT Lite. After this generic discussion there is a detailed explana-
tion of the SoftConfig interface specific to the ADSP-BF609 EZ-KIT
Lite.
Figure 2-2
shows two individual FET switches (Pericom PI3A125CEX)
with reference designators UA and UB. Net names
control UA and UB. The default FET switch enable settings in this
B
example are controlled by resistors
of UA and UB to ground (low). In a real example, these enable signals are
controlled by the Microchip IO expander. The default pull-down resistors
connects the signals
connects signals
EXAMPLE_SIGNAL_A
used to change
ENABLE_A
the Microchip. The same procedure for
from
PLE_SIGNAL_C
Figure 2-2. Example of Individual FET Switches
2-4
RA
EXAMPLE_SIGNAL_A
and
EXAMPLE_SIGNAL_C
from
EXAMPLE_SIGNAL_B
to a logic 1 through software that interfaces with
EXAMPLE_SIGNAL_D
ADSP-BF609 EZ-KIT Lite Evaluation System Manual
ENABLE_A
and
which pull the enable pin 1
RB
and
EXAMPLE_SIGNAL_B
. To disconnect
EXAMPLE_SIGNAL_D
, the Microchip IO expander is
would disconnect
ENABLE_B
.
and
ENABLE_
and also
EXAM-
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