ADSP-BF526 EZ-Board Evaluation System Manual
2-15
ADSP-BF526 EZ-Board Hardware Reference
UART Setup Switch (SW14)
The UART setup switch (
SW14
) configures the
UART1
signals from the
GPIO pins of the processor. By default,
SW14
is
OFF
,
ON
,
OFF
,
ON
. Flow con-
trol is not implemented in the POST program, so
SW14
positions 1 and 3
should be
OFF
and position 4 should be
ON
for loopback flow control.
Refer to the ADM1385 data sheet on the Analog Devices Web Site for
more information about the UART interface.
Programmable Flag Push Buttons (SW15 and SW19)
Two momentary push buttons (
SW15
and
SW19
) are provided for gen-
eral-purpose user input. The buttons connect to the
PG0
and
PG13
GPIO
pins of the processor. The push buttons are active high and, when pressed,
send a high (
1
) to the processor. The GPIO enable switch (
SW20
) discon-
nects the push buttons from the corresponding push button signals. Refer
to
“GPIO Enable Switch (SW20)” on page 2-16
for more information.
Power-Down and Wake Push Buttons (SW16–17)
Two momentary push buttons (
SW16—17
) are provided for optional power
feature inputs. The buttons connect to the
PG12
and
PG15
GPIO pins of
the processor. The push buttons are active high and, when pressed, send a
high (
1
) to the processor. The GPIO enable switch (
SW20
) disconnects the
push buttons from the corresponding push buttons signals. Refer to
“GPIO Enable Switch (SW20)” on page 2-16
for more information.
The power-down push button (
SW16
) is intended as an GPIO input to the
processor and can be configured to put the processor in any one of the
sleep modes.
The wake push button (
SW17
) is connected to the flag pin (
PG15
), which
can be configured as the dedicated
WAKE
input signal from hibernation.
Refer to the
ADSP-BF52x Blackfin Processor Hardware Reference Manual
for more information.
