Using ADSP-BF538F EZ-KIT Lite
The frame sync and bit clocks are generated from the ADC and feed to the processor because the ADC is operating in master mode. The audio inter- face samples data at a 48 kHz sample rate. The serial data interface operates in 2-wire interface (TWI) mode and connects to SPORT0 of the processor.
The audio interface can be disconnected from the SPORT0 by turning positions 1 and 5 of the SW7 switch OFF. When in the OFF position, the SPORT0 signals can be used on the SPORT0 connector (P6) or on the expan- sion interface (see “SPORT0 and SPORT1 Connectors (P6 and P7)” on page 2-23and “Audio Enable Switch (SW7)” on page 2-12for more information).
Example programs are included in the EZ-KIT Lite installation directory to demonstrate audio circuit operation.
LEDs and Push Buttons
The EZ-KIT Lite provides four push buttons and five LEDs for gen- eral-purpose IO.
The five LEDs, labeled LED2 through LED6, are accessed via the PC5–9pro- cessor pins. For information on how to program the pins, refer to the ADSP-BF538/ADSP-BF538F Blackfin Processor Hardware Reference.
The four general-purpose push button are labeled SW10 through SW13. A status of each individual button can be read through the processor’s pro- grammable flag inputs, PF0–3. The signal reads 1 when a corresponding switch is being pressed-on. When the switch is released, the signal reads 0. A connection between the push button and programmable flag input is established through the DIP switch, SW5. See “LEDs and Push Buttons” on page 2-17for details.
An example program is included in the EZ-KIT Lite installation directory to demonstrate functionality of the LEDs and push buttons.
ADSP-BF538F EZ-KIT Lite Evaluation System Manual | 1-13 |