Electret Microphone Select Switch (Sw4); Uart Enable Switch (Sw5); Loop-Back Test Switches (Sw6 And Sw14) - Analog Devices ADSP-21375 Manual

Switch Settings

Electret Microphone Select Switch (SW4)

To connect an electret microphone to the audio input, place all positions
of the switch
SW4
of the positions are
SW4
gain of the input amplifiers is changed from 1x to 10x.

UART Enable Switch (SW5)

The UART enable switch (
pins of the processor. When the switch is
(see 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.

Loop-Back Test Switches (SW6 and SW14)

The loop-back test switch
The second loop-back test switch,
the board. These switches are used only for testing; all switch positions
should remain
2-12
. The default position of the switch is all
ON
, a DC offset of 2.5V is added to the signal, and
ON
) disconnects UART signals from the DPI
SW5
EZ-KIT Lite Signal
CTS
RX
RTS
tied to
T2IN
is located at the top left side of the board.
SW6
.
OFF
ADSP-21375 EZ-KIT Lite Evaluation System Manual
, the associated DPI signal
OFF
Processor Signal
DPI12
DPI10
DPI11
N/A
R2OUT
, is located at the top right side of
SW14
. When all
OFF