Datasheet

ADSP-21479 EZ-Board Evaluation System Manual 1-19
Using ADSP-21479 EZ-Board
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-21479 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.
An example program is included in the ADSP-21479 installation directory
to demonstrate functionality of the LEDs and push buttons.
JTAG Interface
The JTAG connector (P1) allows the standalone debug agent module to
connect a VisualDSP++ debug session to the ADSP-21479 processor. The
debug agent operates only when the external 5V wall adaptor (
P5) is used.
The standalone debug agent can be replaced by an external emulator, such
as the Analog Devices high-performance USB-based emulator. Be careful
not to damage the connectors when removing the debug agent. The emu-
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
SW10 (PB3) DAI_P19 SW7.3
SW11 (PB4) DAI_P20 SW7.4