VL6180 datasheet(39/73 Pages) STMICROELECTRONICS

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VL6180

Device registers

This section describes in detail all user accessible device registers. Registers are grouped

by function as shown in Table 22. to make them easier to read but also to simplify multi-byte

read/write I2C accesses (burst mode). More details in Section 4. Reset values are given for

each register which denotes the register value in software standby.

Note that registers can be 8-,16- or 32-bit. Multi-byte registers are always addressed in

ascending order with MSB first as shown in Table 23.

6.1

Some registers are encoded to allow rational numbers to be expressed efficiently. Table 24

gives an explanation of 9.7 and 4.4 encoding formats. Table 25 gives a summary of the

device registers.

Table 22. Register groups

Address range

IDENTIFICATION

0x000 - 0x00F

SYSTEM SETUP

0x010 - 0x017

RANGE SETUP

0x018 - 0x037

RESULTS

0x04D - 0x080

Table 23. 32-bit register example

Byte

Address

MSB

Address + 1

Address + 2

Address + 3

LSB

Table 24. Register formats

Format

Description

9.7

9 integer bits + 7 fractional bits (stored over 2 bytes)

For example, the value 4.2 is multiplied by 128, rounded and stored as

537 decimal. To decode, divide 537 by 128 = 4.19.

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