AS7331 datasheet(50/72 Pages) AMSOSRAM

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AS7331

Datasheet

• PUBLIC

DS001047

• v4-00 • 2023-Mar-24

│ 49

8.2

Detailed Register Description

8.2.1

Operational State Register - OSR (Address 0h)

Figure 45:

Operational State Register

Addr: 0h

OSR

Bit

Bit Name

Default

Access

Bit Description

Number

Function

Stop of measurement.

Start of measurement (only if

DOS = MEASUREMENT).

Number

Function

Power Down state switched

OFF.

Power Down state switched

ON.

SW_RES

Only active during write access, a read access

always returns

“0”.

Number

Function

Software reset

2:0

DOS

010

Device operational state.

The OSR result of a register read process

always returns 010b or 011b for the DOS bits.

Number

Function

00X

NOP (no change of DOS).

010

Operational state:

CONFIGURATION

011

Operational state:

MEASUREMENT

1XX

NOP (no change of DOS).

DOS switches the operational state of the AS7331 between configuration and measurement. The

configuration state enables access to the control register bank (Figure 44) and no measurement takes

place. The measurement access to the result registers can only be performed in the measurement

state. Then any access to the control register bank (except OSR) will not be possible. If the

operational state is switched back to the configuration state by DOS = 010b, the control registers will

keep their values and the measurement result registers will be cleared. Any ongoing measurement will

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