Analog Devices EZ-KIT Lite ADSP-21364 - Manual (Page 33)

ADSP-21364 EZ-KIT Lite Evaluation System Manual 1-11
Using ADSP-21364 EZ-KIT Lite
The LEDs connect to the parallel port pins,
AD7–0
, via a latch. The parallel
port of the processor can be set up as a memory bus or as general-purpose
FLAG pins. The latch allows the LEDs to be written to in both cases. Infor-
mation about setting up the latch can be found in “Push Button Enable
Switch (SW9)” on page 2-11 .
When the LEDs are accessed as FLAG pins, the latch must be set up to pass
the data through to pins
AD7–0
of the processor. In this mode, it is also
necessary to set up the parallel port to be FLAG pins. To set up the parallel
port as FLAG pins, set the PPFLGS bit in the SYSCTL register.
Table 1-3 summarizes the LED and FLAG connections.
L
An example program is included in the EZ-KIT Lite installation
directory to demonstrate the functionality of the LEDs and push
buttons.
Table 1-3. LED Connections
LED Reference Designator Processor Pin Mapped as FLAG
LED1 AD0 FLAG8
LED2 AD1 FLAG9
LED3 AD2 FLAG10
LED4 AD3 FLAG11
LED5 AD4 FLAG12
LED6 AD5 FLAG13
LED7 AD6 FLAG14
LED8 AD7 FLAG15