Leds And Push Buttons - Analog Devices ADSP-21369 EZ-KIT Lite Manual

LEDs and Push Buttons

LEDs and Push Buttons
The EZ-KIT Lite has eight general-purpose user LEDs and four gen-
eral-purpose push buttons.
Two general-purpose push buttons are attached to the
processor, while the other two are attached to the DAI pins. All of the
push buttons are connected to the processor through a DIP switch (
The DIP switch can disconnect the processor pins connected to the push
buttons. See "Push Button Enable Switch (SW7)" on page 2-13
instructions on how to disable a push button from driving its correspond-
ing processor pin.
The state of the push buttons connected to the
mined by reading 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.
Table 1-2. Push Button Connections
Push Button Label
PB1
PB2
PB3
PB4
Table 1-3 summarizes the LED connections to the processor. To use the
LEDs connected to the DAI or DPI pins, configure the respective registers
of the processor. For more information, refer to the ADSP-21368 SHARC
Processor Hardware Reference (includes ADSP-21369).
1-12
www.BDTIC.com/ADI
register. The push buttons connected to the
FLAG
Push Button Reference Designator
SW8
SW11
SW10
SW9
ADSP-21369 EZ-KIT Lite Evaluation System Manual
pins of the
FLAG
for
pins can be deter-
FLAG
Table 1-2 shows the push
Processor Pin
FLAG1/~IRQ1
FLAG0/~IRQ0
DAI19
DAI20
).
SW7