ADSP-21375 EZ-KIT Lite Evaluation System Manual
1-11
Using ADSP-21375 EZ-KIT Lite
The RCA connector (
J10
) is used to input analog audio. When using an
electret microphone on this connector, configure the
SW4
switch according
to the instructions in
“Electret Microphone Select Switch (SW4)” on
. The four output channels connect to the RCA connector
J5
.
Channel 4 of the codec connects to the headphone jack
J9
. For more
information about the connectors see
.
Example programs are included in the EZ-KIT Lite installation directory
to demonstrate how to configure and use the board’s analog audio
interface.
LEDs and Push Buttons
The EZ-KIT Lite has eight general-purpose user LEDs and four gen-
eral-purpose push buttons.
Two of the general-purpose push buttons are attached to the
FLAG
pins of
the processor, while the other two are attached to the DAI pins. All of the
push buttons connect to the processor through a DIP switch. The DIP
switch allows processor pins, which connect to the push buttons, to be dis-
connected. See
“Push Button Enable Switch (SW7)” on page 2-13
for
instructions on how to disable a push button from driving its correspond-
ing processor pin.
The state of the push buttons, connected to the
FLAG
pins, can be deter-
mined by reading the
FLAG
register. The push buttons connected to the
DAI pins must be configured as interrupts. It is necessary to set up an
interrupt routine to determine each pin’s state.
button and processor connections. Refer to the related example program
shipped with the EZ-KIT Lite for more information.