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AS73211

Functional Description

Datasheet

• PUBLIC

DS000556

• v3-01 • 2018-Feb-07

│ 17

OSR programmi

ng: 83h, start of continuous measurement via OSR:SS = ‚1‘, while device is

already in measurement mode (OSR:DOS = 011b),

OSR programming: 03h, abortion of continuous measurement via OSR:SS = ‚0‘ – here while

pause time TBREAK is already activated to get the last measurement results.

It is recommended to read the measurement results during the break between two consecutive con-

versions. This pause time TBREAK can be configured in steps

of 8μs up to 2040μs long (see Figure

52). Please note that the break time should be long enough to prevent overlapping of data fetch

activities with the measurement for avoiding measurement disturbances, which could cause distortions

of the measurement results

Figure 15:

Principles Sequence for a Measurement Start in CONT Mode

7.6

Command Measurement Mode

– CMD

The CMD mode enables a start of a single conversion. Each conversion starts by setting the bit

OSR:SS to ‚1‘. The conversion time (TCONV) is determined by the content of the register

CREG1:TIME (see Figure 48). Figure 16 shows the first measurement starting from the Configuration

state by setting the bits of the Device Operational State (OSR:DOS) and Start/Stop (OSR:SS) at the

same time with OSR = 83h. For the next measurement start OSR = 80h is set (only bit OSR:SS,

OSR:DOS = 000b corresponds to NOP

– no operation, see also Figure 45.

The rising edge of READY signalizes the end of conversion and its valid output data can be read via

the I²C interface (data fetch).

IDLE

PAUSE

MRES1 …

MRES3

READY

STATE

I²C activity

MEASUREMENT 1

data

fetch

start (OSR:SS ← ,1')

IDLE

RESULTS 1

RESULTS 2

data

fetch

stop (OSR:SS ← ,0')

MEASUREMENT 2

TCONV

TBREAK

TBREAK aborted

PAUSE

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