ADSP-21262 EZ-KIT Lite Evaluation System Manual
3-11
EZ-KIT Lite Hardware Reference
Position 6 of
SW9
connects or disconnects the latch-enable pin of the LED
to the logical “
OR
” of the
~WE
and
~LED_CS
signals. When position is “
OFF
”,
the latch-enable pin of the LED latch ((
U24
) is always pulled “
HIGH
”, mak-
ing the latch transparent. In this position, the value of the LEDs is directly
connected to
AD7–0
. When position 6 is “
ON
”, the values of the LEDs are
set by writing to a memory location. The lower 8 bits of the data written
to the address
0x1400 0000
set the values of the LEDs. By default, position
6 is “
ON
”, allowing the LEDs to be written by writing to a memory
address. For more information refer to
“Using LEDs and Push Buttons”
on page 2-6
.
Boot Mode and Clock Ratio Select Switch (SW10)
The
SW10
switch sets the boot mode and clock multiplier ration.
Table 3-5
shows how to set up the boot mode using positions 1 and 2. By default,
the EZ-KIT Lite boots in SPI master mode and Parallel Port mode, and
the DSP boots from Flash memory.
Table 3-4. Push Button Enable Switch (SW9) Connections
Switch Position
Push Button Reference Designator
DSP Pin
1
SW1
FLAG1
2
SW2
FLAG2
3
SW3
DAI19
4
SW4
DAI20
Table 3-5. Boot Mode Configuration
BOOTCFG1 Pin (Position 2)
BOOTCFG0 Pin (Position 1)
Boot Mode
OFF
OFF
SPI Slave Boot
OFF
ON
SPI Master Boot
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