User's Manual

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.

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