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Document Number: 83798

8

Rev. 1.5, 12-May-11

This document is subject to change without notice.

VCNL4000

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.

Register #7 and #8 Proximity Measurement Result Register

Register address = 87h and 88h. These registers are the result registers for proximity measurement readings.

The result is a 16 bit value. The high byte is stored in register #7 and the low byte in register #8.

Register #9 Proximity Measurement Signal Frequency

Register address = 89h.

TABLE 5 - AMBIENT LIGHT RESULT REGISTER #5

Bit 7

Bit 6Bit 5Bit 4Bit 3

Bit 2Bit 1Bit 0

Description

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

TABLE 6 - AMBIENT LIGHT RESULT REGISTER #6

Bit 7

Bit 6Bit 5Bit 4Bit 3

Bit 2Bit 1Bit 0

Description

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

TABLE 7 - PROXIMITY RESULT REGISTER #7

Bit 7

Bit 6Bit 5Bit 4Bit 3

Bit 2Bit 1Bit 0

Description

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

TABLE 8 - PROXIMITY RESULT REGISTER #8

Bit 7

Bit 6Bit 5Bit 4Bit 3

Bit 2Bit 1Bit 0

Description

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

TABLE 9 - PROXIMITY MEASUREMENT SIGNAL FREQUENCY #9

Bit 7

Bit 6Bit 5Bit 4Bit 3

Bit 2Bit 1Bit 0

N/A

Proximity frequency

Description

Bit 0 and 1

Proximity frequency

R/W bits. Setting the proximity IR test signal frequency. The proximity measurement is using a square IR

signal as measurement signal. Four different values are possible:

00 = 3.125 MHz

01 = 1.5625 MHz

02 = 781.25 kHz (DEFAULT)

03 = 390.625 kHz