Flag Pins - Analog Devices ADSP-21375 Manual

System Architecture
The DPI pins connect to the SPI flash memory, the SPI interface of the
AD1835A codec, a UART, a 20-pin header, and five LEDs.
illustrates the EZ-KIT Lite's connections to the DPI.
To use the DPI for a different purpose, disable any signal driving the DPI
pins with a switch (see
DPI pin connected to a LED can be used without having to disconnect
the pin. You can, however, see the respective LED turn
using the signal elsewhere on the board.
All of the DPI signals are available externally via the expansion interface
connectors (
J1–3
these connectors can be found in
on page B-1.

FLAG Pins

The processor has four general-purpose IO flag pins.
the flag connections.
Table 2-1. IO FLAG Pins
FLAG Pin
FLAG0
FLAG1
FLAG2
FLAG3
For information on how to disable a push button from driving its corre-
sponding processor flag pin, see
page 2-13.
2-6
"UART Enable Switch (SW5)" on page
), as well as the 0.1" spaced header
"ADSP-21375 EZ-KIT Lite Schematic"
EZ-KIT Lite Function
Push button ( ) input
SW2
Push button ( ) input
SW2
SDRAM chip select
LED8
"Push Button Enable Switch (SW7)" on
ADSP-21375 EZ-KIT Lite Evaluation System Manual
Figure 2-3
2-12). Any
and when
ON OFF
. The pinout of
P3
Table 2-1 describes