System Architecture
3-6 ADSP-21262 EZ-KIT Lite Evaluation System Manual
SPI Interface
The DSP’s serial peripheral interconnect (SPI) interface is connected to an
SPI Flash memory, the CS8416 SPDIF receiver, and the AD1835A audio
codec. The
FLAG0
pin is used as a memory select for accessing the SPI
Flash memory, and the
FLAG3
pin is used for accessing the AD1835A’s
configuration registers.
All of the SPI signals are available externally via the expansion interface
connectors (
J3–1
), as well as the 0.1' spaced header
P2
. The pinout of
these connectors can be found in
“Schematics” on page B-1
.
FLAG Pins
The DSP has four general-purpose IO
FLAG
pins.
Table 3-1
describes the
connection of each flag.
For information on how to disable the push buttons from driving the cor-
responding DSP flag pin, see section
“Push Button Enable Switch (SW9)”
on page 3-10
.
The
FLAG
signals are available externally via the expansion interface con-
nectors (
J3–1
). The pinout of these connectors can be found in
“Schematics” on page B-1
.
Table 3-1. IO FLAG Pins
FLAG Pin
EZ-KIT Lite Function
FLAG0
SPI Flash chip select
FLAG1
Push button (
SW1
) input
FLAG2
Push button (
SW2
) input
FLAG3
AD1835A SPI interface chip select
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from