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AS7331

Datasheet

• PUBLIC

DS001047

• v4-00 • 2023-Mar-24

│ 58

Addr: Bh

OPTREG

Bit

Bit Name

Default [b]

Access

Bit Description

INIT_IDX

Value [b]

Function

Defining the index address is

only possible via write

sequence and not affected

by I²C STOP condition, which

is necessary, if the I²C

master does not support the

I²C repeated START

condition.

Each I²C STOP condition

sets the internal register

address to the default value.

After writing an index

address, it is possible to

change the data direction for

reading using I²C repeated

START condition.

8.2.9

Output Register Bank

All output result registers are 16-bit registers. The read access of the registers is only possible if the

Measurement state is activated. One exception offers register OSR, which is also writable. In that

case, one byte is assigned to the address 0h (see chapter 8.2.1). However, the read access of

address 0h in the Measurement state results in the first byte for OSR information and the second byte

for STATUS information.

Figure 54:

Output Result Register Bank

Address(1)

[hex]

Access(2)

Name

Number

of Bits

Description

OSR

8(1)

Operational State Register.

STATUS

8(1)

Status Register.

TEMP

16(2)

Temperature Measurement Result (0h +

12 bits for the value).

MRES1

16(2)

Measurement Result A-Channel.

MRES2

16(2)

Measurement Result B-Channel.

MRES3

16(2)

Measurement Result C-Channel.

OUTCONVL

16(2)

Time reference, result of conversion time

measurement (least significant byte and

middle byte).

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