ADSP-BF538F EZ-KIT Lite Evaluation System Manual
1-13
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
and
“Audio Enable Switch (SW7)” on page 2-12
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
PC5–9
pro-
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
An example program is included in the EZ-KIT Lite installation directory
to demonstrate functionality of the LEDs and push buttons.
