Datasheet

ADSP-21369 EZ-KIT Lite Evaluation System Manual 2-13

ADSP-21369 EZ-KIT Lite Hardware Reference

Push Button Enable Switch (SW7)

The push button enable switch (SW7) disconnects the push buttons from

the respective processor pins. This allows the signals to be used elsewhere

on the board. Table 2-6 shows switch SW7 connections. By default, all

positions of SW7 are ON, and the push buttons function as designed.

SPI Disable Switch (SW15)

The SPI interface switch (SW15) disables the SPI chip select lines con-

nected to SPI flash memory and AD1835A audio codec. The switch allows

you to re-use the same pins on the SPI interface and expansion interface.

By default, SW15 positions 1–3 are ON and position 4 is OFF unless any of

the SPI interface signals are used on the expansion connector or via an

EZ-Extender

ELVIS Oscilloscope Configuration Switch (SW1)

The oscilloscope configuration switch (SW1) determines which audio cir-

cuit signals connect to channels A and B of the oscilloscope. The switch is

used only when the board is connected to the Educational Laboratory Vir-

tual Instrumentation Suite (ELVIS) station (see “ELVIS Interface” on

page 1-9). Each channel must have only one signal selected at a time, as

described in Table 2-7.

Table 2-6. Push Button Enable Switch (SW7)

Switch Position Push Button Label Push Button Reference Designator Processor Pin

PB1 SW8 FLAG1/~IRQ

2 PB2 SW11 FLAG0/~IRQ0

3 PB3 SW10 DAI19

4 PB4 SW9 DAI20