Analog Devices ADSP-2189M EZ-KIT Lite, Руководство пользователя

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Board Layout
3-4 ADSP-2189M EZ-KIT Lite Evaluation System Manual
User LEDs
•
LED1
LED is a green light emitting diode which is on whenever the
board has power.
•
LED2
is an amber light emitting diode which is on whenever there is
data transmitted via the serial port.
•
LED3
is an amber light emitting diode, which is “
ON
” whenever data
is received via the serial port.
•
LED4
is an amber light emitting diode, which is controlled by the
FL1
output of the ADSP-2189M processor. Software can control
the state of this indicator by writing to an internal register.
•
LED5
is a red light emitting diode which indicates whether
RESET
is
asserted.
Switches
• The
SW1
switch is the interrupt push button switch. Pushing this
button causes the ADSP-2189M to receive an
IRQE
interrupt input.
The processor then executes the current
IRQE
interrupt handler
software if the interrupt is enabled and the
IRQE
interrupt vector is
in place. The interrupt switch output is de-bounced electronically
to prevent multiple interrupts due to mechanical contact bounce.
• The
SW2
switch is the reset push button switch. Pushing this but-
ton causes the ADSP-2189M processor and the AD7322 codec to
enter the hardware reset state and remain there until it is released.
The switch outputs are de-bounced electronically to prevent multi-
ple transitions due to mechanical contact bounce.