Analog Devices EZ-KIT Lite ADSP-BF538F, Системное руководство

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ADSP-BF538F EZ-KIT Lite Evaluation System Manual 2-11
ADSP-BF538F EZ-KIT Lite Hardware Reference
Push Button Enable Switch (SW5)
The push button enable switch (
SW5
) disconnects the associated signal and
the push button circuit drivers from the GPIO pins of the processor.
When the
SW5
switch is in the
OFF
position, the GPIO signal
(see Table 2-5 ) can be used on the expansion interface.
Flash Enable Switch (SW6)
The flash enable switch (
SW6
) disconnects the
~AMS
signals from the exter-
nal flash memory, allowing other devices to utilize the signals via the
expansion interface. For each switch listed in
Table 2-6 that is turned
OFF
,
the size of available flash memory is reduced by 1 MB.
Table 2-5. Push Button Enable Switch (SW5)
Push Button SW5 Switch Position (Default) Processor Signal
PB1
(
SW13
) 1 (
ON
)
PF0
PB2
(
SW12
) 2 (
ON
)
PF1
PB3
(
SW11
) 3 (
ON
)
PF2
PB4
(
SW10
) 4 (
ON
)
PF3
Table 2-6. Flash Enable Switch (SW6)
Processor Signal SW6 Switch Position (Default)
~AMS0
1 (
ON
)
~AMS1
2 (
ON
)
~AMS2
3 (
ON
)
~AMS3
4 (
ON
)