JTAG Interface
1-28
ADSP-BF526 EZ-Board Evaluation System Manual
For a power down interrupt, signal
LED2_HOSTACK
is wired to
SW20.3
(GPIO enable switch), which allows a push button (
SW16
) to drive an
interrupt to the ADSP-BF526 processor. The
PG12
port pin of the proces-
sor should be set up as a GPIO pin. Turning switch
SW20.3
ON
connects
the push button (
SW16
) to the processor. By default,
SW20.3
is
OFF
.
A wake interrupt can be set up by turning switch
SW20.4
ON
and setting the
processor’s flag pin
PG15
as the wake interrupt. When push button
SW17
(labelled
WAKE
) is pressed,
PG15
receives a low-to-high transition. The
PG15
processor pin is shared with the audio codec (
U31
), Ethernet PHY (
U29
),
and
HOSTCE
signal. Do not use these features when using the wake inter-
rupt push button.
An example program is included in the ADSP-BF526 installation direc-
tory to demonstrate functionality of the LEDs and push buttons.
JTAG Interface
The JTAG connector (
P1
) allows the standalone debug agent to connect a
debug session to the ADSP-BF526 processor. The debug agent operates
only when the external 5V wall adaptor is used (
P14
). When operating the
EZ-Board from a battery or USB bus power, the debug agent is not
powered.
The standalone debug agent can be removed, and an external emulator
can be attached to the EZ-Board. Be careful not to damage the connectors
when removing the debug agent. The emulator connects to
P1
on the back
side of the board. See
“CCES Install and Session Startup” on page 1-5
or
“Vi+ Install and Session Startup” on page 1-9
for more
information.
For more information about emulators, contact Analog Devices or go to:
Содержание ADSP-BF526 EZ-Board
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