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db12348e_V3.11_preliminary_2017-07-06

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AS89010

V3.11

OPERATIONAL

STATE REGISTER

OSR

NAME

VALUE

[b]

AFFECTED OPERATIONAL STATE

Operational State

01020

operational state: configuration

011

operational state: measurement

1XX

reserved

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

configuration state enables the access to the register bank (Table 7). No measurement takes place.

The measurements can only be performed in the measurement state and any access to the control register

bank (except OSR) is not permitted. The control register would be reset to their default values each time

the operational state is switched back to the configuration state.

The start of the measurement is controlled by the value of the SS bit. These signals are evaluated only in

the measurement state and only in the CONT and CMD Mode (refer to chapter 5.1).

The Power down mode is controlled by the PD value. The Power down takes effect in both operational

states. If the PD is active in the measurement state, the Power down would be performed only during the

breaks between two consequent conversions.

6.2.1 API Generation Register – AGEN

The value of this read only register indicates the generation of the Control Register Bank. The value of the

indicates that the Application Programming Interface (API) has been changed.

Table 9: AGEN register - Address 02h

AGEN

NAME

VALUE

[b]

DESCRIPTION

bit 7 to 4

DEVID

0010

Device ID number; the value 0010b is reserved for MCDC devices

bit 3 to 0

MUT

0000

Mutation number of Control Register Bank

6.2.2 Configuration Register – CREGL and CREGH

The configuration register CREGL mainly serves to define full-scale-range, sensitivity and conversion time

of the device.

Table 10: CREGL register - Address 06h

CREGL

NAME

VALUE [b]

AFFECTED CONFIGURATION

input current direction out of the IN0-IN4 pins (the cathodes of the

photodiode connected to the input pins)

122

input current direction into the IN0-IN4 pin (the anodes of the

photodiodes connected to the input pins)

ADC Reference

Current

IREF

ADC LSB Current (TINT=1024 ms)

000

20 nA

20 fA

001

80 nA

80 fA

010

320 nA

320 fA

22 Default after power-on-reset and state change from measurement to configuration.

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