Datasheet

ADSP-21262 EZ-KIT Lite Evaluation System Manual 1-11
Using ADSP-21262 EZ-KIT Lite
Shipped with the kit example programs demonstrate how to configure and
use the board’s digital 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 processor’s
FLAG pins, while the other two are attached to the DAI pins. All of the
push buttons connect to the processor through a DIP switch. See “Push
Button Enable Switch (SW9)” on page 2-12 for instructions on how to
disable the push buttons from driving the corresponding processor pins.
The value 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. Table 1-2 shows how each
push button connects to the processor. Refer to the related example pro-
gram shipped with the EZ-KIT Lite for more information.
Table 1-2. Push Button Connections
Push Button Reference Designator Processor Pin
SW1 FLAG1
SW2 FLAG2
SW3 DAI_P19
SW4 DAI_P20