AS73211 datasheet(46/66 Pages) OSRAM

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AS73211

Datasheet

• PUBLIC

DS000556

• v3-01 • 2018-Feb-07

│ 45

Figure 45:

Operational State Register (OSR) ¬

– Address 0h

OPERATIONAL

STATE

NAME

VALUE [b]

OPERATIONAL STATE

bit 7

0 (1)

Stop of the measurement

Start of the measurement (only possible with DOS =

MEASUREMENT)

bit 6

Power Down state switched OFF

1 (2)

Power Down state switched ON

bit 5 and 4

Reserved (3)

bit 3 (4)

SW_RES

0 (5)

Software reset

bit 2 to 0

Device Operational

State (6)

(DOS)

00X

NOP (no change of DOS)

010 (7)

Operational state: CONFIGURATION

011

Operational state: MEASUREMENT

1XX

NOP (no change of DOS)

(1)

Default value after power-on reset, software reset and change into Configuration state.

(2)

Default value after power-on reset and software reset.

(3)

The read value is always 00b as well as the recommended write value.

(4)

Bit 3 (SW_RES) is only active during write access, a read

access always returns ‚0‘.

(5)

Default value after power-on reset and software reset

(6)

The OSR result of a register read process always returns 010b or 011b for the DOS bits.

(7)

Default value after power-on-reset, software reset or after mode change from measurement mode to configuration

mode.

DOS switches the operational state of the AS73211 between configuration and measurement. The

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

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

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

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

their values. The measurement result registers are cleared. Any ongoing measurement is stopped

immediately. The DOS sequence “NOP” (00Xb or 1XXb) does not change the operational state, but

the values of the other written OSR bits are effective.

SW_RES = ‚1‘ causes a software reset of the AS73211. A running measurement is stopped

immediately and the AS73211 is set to configuration state. All registers are reset to their initial values.

The start of a measurement is controlled by the value of bit SS. This bit is only interpreted in the

measurement state.

The Power Down state is controlled by the value of bit PD.

The Power Down takes effect in both operational states: configuration and measurement. If the Power

Down state is switched on while the device is in measurement state, the power down is only

performed during the breaks between two conversions.

AS73211 数据表(PDF) 46 Page - OSRAM GmbH

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