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VCNL4010
www.vishay.com
Vishay Semiconductors
Example: read register “Ambient Light Result Register” #5 and #6:
Addressing:command: 26h, 85h (VCNL4010_I 2 C_Bus_Write_Adr., Ambient Light Result Register #5 [85])
Read register #5:command: 27h, data (VCNL4010_I 2 C_Bus_Read_Adr., {High Byte Data of Ambient Light Result register #5
[85])}
Read register #6:command: 27h, data (VCNL4010_I 2 C_Bus_Read_Adr., {Low Byte Data of Ambient Light Result register #6
[86])}
3.3 Continuous Conversion Mode in Ambient Light Measurement
In the following is a detail description of the function “continuous conversion” (bit 7 of register #4)
Standard mode (bit 7 of reg #4 = 0):
In standard mode the ambient light measurement is done during a fixed time frame of 100 ms. The single measurement itself
takes actually only appr. 300 μs.
The following figures show examples of this measurement timing in standard mode using averaging function 2 and 8 as
examples for illustration (possible values up to 128).
S tart
50 m s
S tart
12.5 m s
100 m s
100 m s
22316
22315
Fig. 15 - Ambient Light Measurement with Averaging = 2;
Final Measurement Result = Average of these 2 Measurements
Fig. 16 - Ambient Light Measurement with Averaging = 8;
Final Measurement Result = Average of these 8 Measurements
Note
? ≥ Independent of setting of averaging the result is available only after 100 ms.
Continuous conversion mode (bit 7 of register #4 = 1):
In continuous conversion mode the single measurements are done directly subsequent after each other.
See following examples in figure 17 and 18
S tart
460 μ s
S tart
460 μ s
1.5 m s
22317
22318
4.2 m s
Fig. 17 - Ambient Light Measurement with Averaging = 2;
using Continuous Conversion Mode
Fig. 18 - Ambient Light Measurement with Averaging = 8;
using Continuous Conversion Mode
Rev. 1.4, 29-Oct-13
12
Document Number: 83462
For technical questions, contact: sensorstechsupport@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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