Analog Devices ADSP-BF707 EZ-KIT Lite Manual page 38

Software-Controlled Switches (SoftConfig)
2-4
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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 exam-
ple are controlled by resistors
and UB to ground (low). In a real example, these enable signals are con-
trolled by the Microchip IO expander. The default pull-down resistors
connects the signals
EXAMPLE_SIGNAL_A
connects signals
EXAMPLE_SIGNAL_C
from
EXAMPLE_SIGNAL_A
used to change
ENABLE_A
the Microchip. The same procedure for
from
PLE_SIGNAL_C EXAMPLE_SIGNAL_D
Figure 2-2. Example of Individual FET Switches
ADSP-BF707 EZ-KIT Lite Evaluation System Manual
and which pull the enable pin 1 of UA
RA RB
and
EXAMPLE_SIGNAL_B
and
EXAMPLE_SIGNAL_D
, the Microchip IO expander is
EXAMPLE_SIGNAL_B
to a logic 1 through software that interfaces with
ENABLE_B
.
and
ENABLE_A ENABLE_B
and also
. To disconnect
would disconnect
EXAM-