User's Manual
– –
HILONC- 3GPS APPLICATION
NOTE
call
is
actively
transmitting
data.
Sleep
mode
(Active
idle)
All
systems
on
HILONC-3GPS
are
active
including
the
USB
bus.
In
this
mode,
the
module
is
registered
to
the
network
but
it
is
idle/paging
only.
No
voice/data
call
connection
is
established.
Fly
mode
The
processor
is
still
active
but
the
radio
section
is
powered
down.
This
mode
can
be
controlled
by
sending
an
AT
command
to
the
module.
4.2.
Module
Power
up
Starting
the
HILONC-3GPS
via
PWON
.
4.2.1.
PWON
Power
up
To
start
the
module,
first
power
up
VBAT
,
which
must
be
in
the
range
3.4V
~
4.2V,
and
must
be
able
to
supply
1.75A
during
TX
bursts.
PWON
is
a
low
level
active
signal
internally
pulled
up
to
a
dedicated
power
domain
of
1.8V.
As
PWON
is
internally
pulled
up,
a
simple
open
collector
or
open
drain
transistor
must
be
used
for
ignition.
To
start
the
module,
a
low
level
pulse
must
be
applied
on
PWON
for
500ms.
After
a
few
seconds,
the
UART_RTS
enters
active
state
and
the
module
is
ready
to
receive
AT
commands.
VGPIO
is
a
supply
output
from
the
module
that
can
be
used
to
check
if
the
module
is
active.
·
When
VGPIO
=
0V
the
module
is
OFF.
·
When
VGPIO
=
2.85V
the
module
is
ON.
TBD
:
Power
on
sequence
TBD
:
Power
off
sequence
Send
AT
COMMAND
“AT+CPOF”
to
power
off
module.
4.2.2.
IO
DC
Presence
before
Power
on
When
VBAT
is
available
but
the
module
has
not
yet
powered
up,
the
following
I/O's
raise
their
output.
VBACKUP
raise
to
3V
PWON
raise
to
1.8V
4.3.
Power
on
and
Sleep
Diagrams
The
2
diagrams
below
show
the
behavior
of
the
module
and
the
DTE
during
power
on
and
then
in
sleep
modes.
Note:
the
module
cannot
enter
sleep
mode
if
USB
bus
is
connected.
TBD
:
Diagram
for
power
on
TBD
:
Diagram
for
sleep
mode
4.4.
Module
Power
off
Note
d’étude
/
Technical
document
:
01/08/20111
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Page
22
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41