Electret Microphone Select Switch (Sw4); Uart Enable Switch (Sw5); Loopback Test Switches (Sw6 And Sw14) - Analog Devices ADSP-21369 EZ-KIT Lite Manual

Switches

Electret Microphone Select Switch (SW4)

To connect an electret microphone to audio input, place all positions of
. The default switch position is all
SW4 ON
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 (
DPI pins of the processor. When
Table 2-5) can be used on the expansion interface.
Table 2-5. UART Enable Switch (SW5)
Switch Position
1
1 (OFF )
2 (ON)
3 (OFF)
4 (ON)
1 Bold typeface denotes the default setting.

Loopback Test Switches (SW6 and SW14)

The loopback test switch (
The second loopback test switch,
the board. These switches are used for testing only; all switch positions
should remain
OFF
2-12
www.BDTIC.com/ADI
) disconnects the UART signals from the
SW5
SW5
EZ-KIT Lite Signal
CTS
RX
RTS
tied to
T2IN R2OUT
) is located at the top left side of the board.
SW6
SW14
.
ADSP-21369 EZ-KIT Lite Evaluation System Manual
. When
OFF SW4
is , its associated DPI signal (see
OFF
Processor Signal
DPI12
DPI10
DPI11
N/A
, is located at the top right side of
is all , a DC
ON