Analog Devices ADSP-BF592 EZ-KIT Lite, Manual

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Push Buttons and Switches
2-8 ADSP-BF592 EZ-KIT Lite Evaluation System Manual
Boot Mode Select Switch (SW4)
The rotary boot mode select switch (
SW4
) determines the boot mode of the
processor. Table 2-4 shows the available boot mode settings. By default,
the ADSP-BF592 processor boots from SPI flash memory.
Push Button Enable Switch (SW5)
The push button enable switch (
SW5
) disconnects all of the associated push
button circuits from the general-purpose I/O (GPIO) pins of the proces-
sor and makes available the I/O signals to the expansion interface.
Fuel Gauge Enable Switch (SW6)
The fuel gauge enable switch (
SW6
) disconnects the battery good (
BAT_GD
)
and battery low (
BAT_LOW
) signals from their respective LEDs (
LED7–8
) (see
Table 2-5 ). The switch also disconnects TWI signals between the proces-
sor and fuel gauge. The TWI signals on the fuel gauge operate only when
a clock on the
SCL
signal is running at up to 100 kHz. If the TWI bus
interfaces with devices operating at above 100 kHz frequency, turn
SW6
OFF
to prevent the bus from hanging. By default,
SW6
is all
OFF
.
Table 2-4. Boot Mode Select Switch (SW4)
SW4 Position Processor Boot Mode
0 Idle—no boot
1 Reserved
2 SPI1 master boot from Flash, using
SPI1SSEL5
3 SPI1 slave boot from external master
4 SPI0 master boot from flash memory using SPI0SSEL2 (default)
5 Boot from PPI port
6 Boot from UART host device
7 Boot from Internal L1 ROM