Jumpers
2-22
ADSP-BF526 EZ-Board Evaluation System Manual
adaptor. Removing
JP9
allows
VR7
to drive 5V to the expansion
interface II; the battery is providing the input to
VR7
. This setting drains
the battery at a much faster rate. See
“EXP 5V Select Jumper (JP8)” on
for more information. By default,
JP9
is installed (
VR7
is
disabled).
SENSE2 Select Jumper (JP10)
The
SENSE2
select jumper (
JP10
) selects between the 3.3V regulator (
VR2
)
and battery voltage as a monitored input for the reset signal. When a
jumper is on positions 1 and 2 of
JP10
, the
BAT_P
signal is monitored,
which is useful when using the 740 mAh lithium ion battery. When a
jumper is on positions 2 and 3 of
JP10
, the 3.3V regulator (
VR2
) is moni-
tored. This setting must be used when no battery is wired to connector
P24
. The
SENSE2
input pin of the ADM13305 voltage reset supervisor is
set to drive the
RESET_3V
signal low when a voltage of less than 3.16V is
measured. By default,
JP10
is installed on positions 2 and 3.
RST/ETH LED Jumper (JP11)
The RST/ETH LED jumper (
JP11
) enables the power saving feature of
the board through control of the voltage translator’s output enable pins.
When
JP11
is not installed, the voltage translator (
U4
), which controls
Ethernet LEDs, and
RESET_3V
signals are tri-stated. Placing a jumper on
positions 1and 2 of
JP11
allows the inverted
WAKEUP_OUT
signal
(
WAKEUP_OUT
) to control the output enable of the translator. When the
processor is not in hibernate, the translator is enabled; when the processor
is in hibernate, the translator outputs are tri-stated. Placing a jumper on
positions 2 and 3 of
JP11
enables the translator outputs. See
and
“Power Saving Features” on page 1-35
for
more information about the power saving capabilities of the EZ-Board. By
default,
JP11
is installed on positions 1 and 2.
