Evaluation Board
User’s Manual 13 Rev. 1.2, 2013-06-06
Software Description for Evaluation Kits
Figure 9 Layout of the Evaluation Board
3.1.3 Operating with External Power Supply
The connector pins “External supply” (JP3) can be used to apply an external V
DD
supply voltage to the sensor.
When using this option, the jumpers JP4 and JP6 need to be set to the “Extern” setting. Then the V
DD
voltage for
the sensor is no longer taken from the PGSISI-2 but from the external power supply. The level-shifters are still
supplied by the PGSISI-2.
Note: When the sensor is supplied by the external supply voltage, the “RESET” and the “POWER” button are only
operating on the GUI, but not on the sensor. In order to do a “Sensor Reset” or a reload of the EEPROM
settings, the external supply voltage needs to be recycled.
3.1.4 Programming of the Sensor EEPROM
The user area of the EEPROM can be reprogrammed via the PGSISI-2. This allows the evaluation of different
settings for the low-pass-filter or overcurrent limit. These settings can be set either temporarily in the RAM until
the power is cycled or can permanently be programmed into the EEPROM. For details please see the software
description.
If the sensor should be protected during evaluation from false EPPROM programming, the jumper J4 can be
opened. In this case, only temporary settings in the RAM can be tested and after a power cycle, the original
settings will be restored again.
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