Switches
2-12
ADSP-21369 EZ-KIT Lite Evaluation System Manual
Electret Microphone Select Switch (SW4)
To connect an electret microphone to audio input, place all positions of
SW4
ON
. The default switch position is all
OFF
. When
SW4
is all
ON
, a DC
offset of 2.5V is added to the signal, and gain of the input amplifiers is
changed from 1x to 10x.
UART Enable Switch (SW5)
The UART enable switch (
SW5
) disconnects the UART signals from the
DPI pins of the processor. When
SW5
is
OFF
, its associated DPI signal (see
Table 2-5
) can be used on the expansion interface.
Loopback Test Switches (SW6 and SW14)
The loopback test switch (
SW6
) is located at the top left side of the board.
The second loopback test switch,
SW14
, is located at the top right side of
the board. These switches are used for testing only; all switch positions
should remain
OFF
.
Table 2-5. UART Enable Switch (SW5)
Switch Position
EZ-KIT Lite Signal
Processor Signal
1 (
OFF
1
)
1 Bold typeface denotes the default setting.
CTS
DPI12
2 (
ON
)
RX
DPI10
3 (
OFF
)
RTS
DPI11
4 (
ON
)
T2IN
tied to
R2OUT
N/A
