Datasheet

LEDs and Push Buttons
1-18 ADSP-21489 EZ-Board Evaluation System Manual
processor. For more information, refer to the ADSP-214xx SHARC Proces-
sor Hardware Reference.
Two general-purpose push buttons are attached to the flag pins of the pro-
cessor, while the other two are attached to the DAI pins. All of the push
buttons and LEDs are connected to the processor through DIP switches.
The DIP switches can disconnect the processor pins, which in turn are
connected to the push buttons and LEDs. See the respective switch section
in “ADSP-21489 EZ-Board Hardware Reference” on page 2-1.
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. Table 1-3 shows the push
button and processor connections.
Table 1-3. LED Connections
LED Reference Designator Processor Pin Connected via Switch
LED1 DPI_P6 SW3.6
LED2 DPI_P13 SW14.5
LED3 DPI_P14 SW14.6
LED4 DAI_P3 SW1.3
LED5 DAI_P4 SW1.4
LED6 DAI_P15 SW2.7
LED7 DAI_P16 SW2.8
LED8 DAI_P17 SW7.1
Table 1-4. Push Button Connections
PB Reference Designator Processor Pin Connected via Switch
SW8 (PB1) FLAG1/IRQ1 SW13.4
SW9
(PB2) FLAG2/IRQ2/MS2 SW13.5