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2.1.5.2 

Prox Output Data 

The top right corner of the Prox tab displays the data that is output by the device. 

PDATA displays the Proximity ADC channel data count. 

ProxAvg displays the average of the last 32 PDATA samples displayed above. 

StDev displays the standard deviation of the last 32 PDATA samples displayed above. 

Note: If HW Prox Averaging is enabled, then the ProxAvg and StDev is calculated based on the last 
32 PDATA averages read. 

 

The Det/Rel box is the detect/release indicator. It turns red when PDATA is above the high 
threshold and stays red until PDATA falls below the low threshold.  

 

The Status section displays the interrupt status. An ‘x’ inside the box indicates the interrupt flag is 
set. To clear an interrupt, click the ‘x’ in the box. If the condition causing the interrupt is still present 
the box gets set to an “x’ again. The PINT box is the proximity interrupt that is set when PDATA 
exceeds the high or low threshold. The CINT box is the calibration interrupt that is set when a 
calibration sequence is complete. The PSAT box is the saturation interrupt to indicate an ambient or 
reflective event cause the ADC data to saturation. The Reflective and Ambient boxes indicate 
which type of PSAT event occurred. 

2.1.5.3 

Prox Data Plot 

The remaining portion of the Prox tab is used to display a running plot of the collected PROX 
values. The last 350 values are collected and plotted on the graph. As additional values are added, 
the old values will be deleted from the left side of the graph. 
 

 

 
The Enable Plot checkbox activates the plotting function.  Data will only be plotted when this box is 

checked. 
 
Click the Clear Plot button to discard the current data and continue plotting the new data. Note, if 
the Clear Plot button is clicked while the plot is disabled, the data is discarded, but the actual plot 
will not be updated until the plot function is re-enabled. 
 

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Summary of Contents for TMD2620 EVM

Page 1: ...User guide TMD2620 EVM TMD2620 Proximity Sensor Evaluation Module Version 1 0 Downloaded from Arrow com...

Page 2: ...VM graphical user interface GUI 5 2 1 Software overview 5 2 1 1 Device ID Information 6 2 1 2 Log Status and Control Information 7 2 1 3 System Menus 7 2 1 4 System Level Controls 9 2 1 5 Prox Tab 10...

Page 3: ...or to connecting any hardware to the computer Follow the instructions found in the Quick Start Guide QSG This will load the required driver for the USB interface and also the control software and grap...

Page 4: ...s running If the green LED does not flash check the USB cable connections unplug the USB cable and try again If the green LED still does not flash check the PC for USB error messages See the Resources...

Page 5: ...There should be enough information to allow evaluation of the TMD2620 device 2 TMD2620 EVM graphical user interface GUI 2 1 Software overview On successful initialization the software displays a main...

Page 6: ...tains controls for the remaining functions and displays status and data from the device as it operates 2 1 1 Device ID Information The lower left corner of the window displays the ID number of the EVM...

Page 7: ...was started The final field in this section controls the number of log samples that will be collected before logging is automatically stopped and the log data is stored If the count of log entries re...

Page 8: ...ogging is stopped the data can be written to a file or you can continue collecting additional data by clicking Start Logging again The Log a Single Entry command will cause logging to start collect on...

Page 9: ...rols the PON function of the TMD2620 When this box is checked the power is on and the device can operate When this box is unchecked the power is off and the device will not operate The control registe...

Page 10: ...e more than the value in the register PPULSE 0 1 pulse is displayed immediately to the right of the box The PPULSE_LEN control sets the width of all IR LED pulses within the proximity cycle Longer pul...

Page 11: ...e multiplied by the HW Prox averaging number The POFFSET control sets the magnitude that adjusts PDATA to remove crosstalk from the proximity data The values range from 255 to 255 The Cal button trigg...

Page 12: ...t when a calibration sequence is complete The PSAT box is the saturation interrupt to indicate an ambient or reflective event cause the ADC data to saturation The Reflective and Ambient boxes indicate...

Page 13: ...regarding the TMD2620 please refer to the datasheet For information regarding the installation of the TMD2620 EVM host application software please refer to the TMD2620 EVM Quick Start Guide Designer...

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