TMD3721 datasheet(54/89 Pages) OSRAM

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Datasheet, Public

Page 53

[v3-00] 2023-May-26

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TMD3721 − Register Overview

in order to run the calibration successfully. An electrical

calibration can be initiated at any time by setting the

ELECTRICAL_CALIBRATION and START_OFFSET_CAL bits. To

perform an optical (and electrical) calibration do not set the

ELECTRICAL_CALIBRATION bit when setting the START_

OFFSET_CAL bit. Electrical and optical calibration functions are

identical, except that during an electrical calibration the

proximity photodiode is disconnected from the AFE.

Upon completion of the calibration, proximity offset registers

are automatically loaded with calibration result, START_

OFFSET_CAL bit will be self-cleared, the CINT flag will assert. If

CIEN is enabled, an interrupt is generated on the INT pin.

CALIB_OFFSET Register (Address 0xD8)

Figure 74:

CALIB_OFFSET Register

Addr: 0xD8

CALIB_OFFSET

Bit

Bit Name

Default

Access

Bit Description

Reserved

Reserved. Must be set to default value.

EN_AUTO_ORE_CAL

Setting this bit to a 1 enables automatic calculation

for PRX_OFFSET_RANGE_EXTENSION during

proximity calibration.

When the bit is 0, the automatic calculation is

disabled, and the PRX_OFFSET_RANGE_EXTENSION

value has to be provided by users.

EN_PRX_OFFSET_

RANGE_EXTENSION

0RW

Setting this bit to a 1 enables the proximity offset

range extension functionality. See the PRX_OFFSET_

RANGE_EXTENSION bits. If this bit is set to 0, the

offset range extension is disabled.

4:0

PRX_OFFSET_

RANGE_EXTENSION

00000

Offset range extension selection.

For PGAIN2=2.5x, all 5 bits are used.

For PGAIN2=5x, the LSB is ignored.

For PGAIN2=10x, 2 LSBs are ignored.

Value

Selection

0 (00000)

Nominal

1 (00001)

Nominal + 1 Step

2 (00010)

Nominal + 2 Steps

3 (00011)

Nominal + 3 Steps

Nominal + (Value) Steps

31 (11111)

Nominal + 31 Steps

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