AMS AS3935, Руководство пользователя

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AS3935 Standard Board
ams Demo Kit Manual, Confidential Page 10
[v1-03] 2014-Jul-08 Document Feedback

Disturber
If the disturbers are masked, no interrupts will occur if a disturber is detected.

Disturber Rejection Settings
With the watchdog threshold level WDTH (R1<3:0>) it is possible to increase the
robustness to disturbers. The AS3935 is also capable of rejecting impulse signals, like
spikes, picked up by the antenna. The spike rejection can be improved via the SREJ Level
defined in R2<3:0>. By default, R2<3:0> = 0x2. Larger values of SREJ correspond to more
robust spike rejection.

Minimum Number of Strikes
It is possible to program the AS3935 to only issue lightning interrupts if a minimum number
of lightning events are detected in a 15 minute time frame. This field allows setting it to 1, 5,
9 or 16 minimum numbers of lightning events. Once this threshold is reached the Lightning
Sensor will display every further detected lightning event.

Oscillators
In case the AS3935 demo board is connected to the GUI via USB before powering up the
demo board, the oscillators will not be calibrated. The calibration procedure can be
executed manually via the GUI. The first step is to measure the default resonance
frequency of the oscillators by pressing “Measure”. The oscillators will show inaccurate
values. Pressing “Calibrate LCO”
will tune the antenna to 500 kHz, which will then allow the
user to calibrate the RCOs by pressing “Calibrate RCOs”. The added tuning caps will be
shown below. See the tuning sequence below:
Measure default values Calibrate LCO Calibrate RCOs

Buzzer Control
The buzzer alarm can be modified for lightning only or can be completely turned off. The
buzzer settings can be saved.

Save Settings / Restore Default Settings
All settings of the AS3935 and the buzzer can be saved by pressing “Save Settings”. To
reset the values to the factory s
ettings press “Restore Default Settings”.

Firmware Update
In order to update the firmware, open Help
→ Firmware Update (Ctrl+F) and select the new
firmware revision.

Show History
The history of the occurred strikes can be read out via the GUI and saved to a log file.

Register Map
The entire register map can be readout via View
→Register Map (Ctrl+M) and can be
modified by clicking on the register entries.