VCNL4010

www.vishay.com

Vishay Semiconductors

Rev. 1.6, 20-Mar-18

8

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

Register #4 Ambient Light Parameter Register

Register address = 84h.

Note

• If self_timed measurement is running, any new value written in this register will not be taken over until the mode is actualy cycled.

Register #5 and #6 Ambient Light Result Register

Register address = 85h and 86h. These registers are the result registers for ambient light measurement readings.

The result is a 16 bit value. The high byte is stored in register #5 and the low byte in register #6.

TABLE 5 - AMBIENT LIGHT PARAMETER REGISTER #4

Bit 7Bit 6Bit 5Bit 4

Bit 3

Bit 2Bit 1Bit 0

Cont. conv.

mode

als_rate

Auto offset

compensation

Averaging function

(number of measurements per run)

Description

Cont. conversion mode

R/W bit. Continuous conversion mode.

Enable = 1; Disable = 0 = DEFAULT

This function can be used for performing faster ambient light measurements. Please refer to the

application information chapter 3.3 for details about this function.

Ambient light measurement rate

R/W bits. Ambient light measurement rate

000 - 1 samples/s

001 - 2 samples/s = DEFAULT

010 - 3 samples/s

011 - 4 samples/s

100 - 5 samples/s

101 - 6 samples/s

110 - 8 samples/s

111 - 10 samples/s

Auto offset compensation

R/W bit. Automatic offset compensation.

Enable = 1 = DEFAULT; Disable = 0

In order to compensate a technology, package or temperature related drift of the ambient light values

there is a built in automatic offset compensation function.

With active auto offset compensation the offset value is measured before each ambient light

measurement and subtracted automatically from actual reading.

Averaging function

R/W bits. Averaging function.

Bit values sets the number of single conversions done during one measurement cycle. Result is the

average value of all conversions.

Number of conversions = 2decimal_value e.g. 0 = 1 conv., 1 = 2 conv, 2 = 4 conv., ….7 = 128 conv.

DEFAULT = 32 conv. (bit 2 to bit 0: 101)

TABLE 6 - AMBIENT LIGHT RESULT REGISTER #5

Bit 7Bit 6Bit 5Bit 4

Bit 3

Bit 2Bit 1Bit 0

Description

Read only bits. High byte (15:8) of ambient light measurement result

TABLE 7 - AMBIENT LIGHT RESULT REGISTER #6

Bit 7Bit 6Bit 5Bit 4

Bit 3

Bit 2Bit 1Bit 0

Description

Read only bits. Low byte (7:0) of ambient light measurement result