FALCOM JP18 GPS receiver - Hardware manual

JP18 FALCOM GPS RECEIVER VERSION 1.0.7
63 μs. Minimum inter-pulse interval is one second. Minimum off
duration is two RTC ticks, about 63 μs. The functions described
assume that power to various sections (RF, IO, LNA) is
controlled through the power management control pin
WAKEUP.
Mode Receiver state Pulse to ON/OFF New state result of pulse to ON/OFF
Main supplies are OFF OFF
Do not attempt. Possible part
damage due if excessive
current is forced into the pin.
Stays off
Hibernate: RF, IO, BB off, VRTC on Hibernate OK Awakening
Full Power GSW/SLC ON and running OK Transitions to Hibernate
Full Power GSW/SLC Hibernate Awakens to Full-power
Adaptive Trickle Power GSW Duty cycle ON
Adaptive Trickle Power GSW Duty cycle OFF
Push-To-Fix GSW ON and running
Do not attempt because of
possible race conditions.
Do not attempt because of
possible race conditions.
Do not attempt because of
possible race conditions.
Push-to-Fix GSW Hibernate
Must verify by monitoring
voltages that receiver is in
Hibernate.
ON
Advanced Power Management SLC Hibernate OK ON
Advanced Power Management SLC ON* OK* Hibernate
Indeterminate due to timing of pulse
with respect to internal asynchronous
mode changes
Indeterminate due to timing of pulse
with respect to internal asynchronous
mode changes
Indeterminate - if receiver is on, it will
be turned off, if turning off, it will be
turned back on
* With SLC firmware, when in HIBERNATE, the controlling code must verify
that APM is enabled, and verify that all sessions are closed. The
controlling code must also allow for a 1 second delay after session is
closed, before any attempt to externally awaken the receiver.
This pin is internally pulled low through a 47 kΩ resistor on the JP18
hardware and not on FSA02. Therefore, on FSA02 this pin should be
pulled low thought a a ~47 kΩ resistor.
Since it is a direct link to the core, this pin is limited to 1.2V. This is not a
fail safe pin. The 1.2V VRTC power and clock should always be on and
stable before this signal is asserted.
The minimum inter-pulse interval is recommended as one second to
allow time for the receiver to change modes in response to the
preceding pulse. This requires that any activation of ON/OFF by
mechanical switches must use suitable de-bouncing techniques to
achieve minimum pulse duration and minimum inter-pulse interval.
This confidential document is the property of FALCOM and may not be copied or circulated without permission.
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