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 AD7–0of 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 1-3summarizes the LED and FLAG connections.
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 |
| | |
An example program is included in the EZ-KIT Lite installation directory to demonstrate the functionality of the LEDs and push buttons.
ADSP-21364 EZ-KIT Lite Evaluation System Manual | 1-11 |