Spi Disable Switch (Sw8); Push Button Enable Switch (Sw9) - Analog Devices ADSP-21364 EZ-KIT Lite Manual

SPI Disable Switch (SW8)

The SPI interface switch (
to the SPI flash memory and the AD1835A audio codec. The switch also
disables the
ADC_LRCLK
switch allows a customer to re-use the same pins on the SPI interface and
on the expansion interface. The
the switch signals or the SPI interface signals are used on the expansion
connector or via an EZ-Extender

Push Button Enable Switch (SW9)

The push button enable switch (
the corresponding processor pins. This allows the signals to be used else-
where on the board.
of the switch positions are
Table 2-3. Push Button Enable Switch (SW9) Connections
Switch Position
1
2
3
4
Position 6 of
SW9
to the logical
OR
latch-enable pin of the LED latch (
transparent. In this position, the value of the LEDs is directly connected
to .
AD7–0
ADSP-21364 EZ-KIT Lite Evaluation System Manual
ADSP-21364 EZ-KIT Lite Hardware Reference
) disables the SPI chip select lines connected
SW8
and
ADC_BCLK
SW8
®
.
SW9
Table 2-3 shows the
.
ON
Push Button Reference Designator
SW1
SW2
SW3
SW4
connects or disconnects the latch-enable pin of the LED
of the and
WE LED_CS
signals on the AD1835A device. The
default is all positions
) disconnects the push buttons from
connections. By default, all
SW9
Processor Pin
FLAG1
FLAG2
DAI_P19
DAI_P20
signals. When position 6 is
) is pulled high, making the latch
U24
unless any of
ON
, the
OFF
2-11