Electret Microphone Select Switch (Sw4); Uart Enable Switch (Sw5); Adsp-21375 Ez-Kit Lite Evaluation System Manual; Loopback Test Switches (Sw6 And Sw14) - Analog Devices Lite ADSP-21375 EZ-KIT System Manual

Switches

Electret Microphone Select Switch (SW4)

UART Enable Switch (SW5)

Loopback Test Switches (SW6 and SW14)

2-12
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To connect an electret microphone to audio input, place all positions of
. The default switch position is all
SW4
of 2.5V is added to the signal, and gain of the input amplifiers is changed
from 1x to 10x.
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.
The loopback test switch (
The second loopback test switch (
the board. These switches are used for testing only; all switch positions
should remain .
OFF

ADSP-21375 EZ-KIT Lite Evaluation System Manual

. When
OFF
) disconnects the UART signals from the
SW5
is , its associated DPI signal (see
SW5 OFF
EZ-KIT Lite Signal
CTS
RX
RTS
tied to
T2IN R2OUT
) is located at the top left side of the board.
SW6
) is located at the top right side of
SW14
is all , a DC offset
SW4 ON
Processor Signal
DPI12
DPI10
DPI11
N/A