TMD2636 datasheet(19/48 Pages) OSRAM

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[v2-00] 2023-Jan-04

TMD2636 − Register Description

PCFG1 Register (0x8F)

Figure 24:

PCFG1 Register

The PPULSE_LEN field sets the length (width) of all IR VCSEL

pulses within the proximity cycle. Longer pulses result in

increased proximity range and typically result in less electrical

noise generated in the analog front end.

Addr: 0x8F

PCFG1

Bit

Bit Name

Default

Access

Bit Description

7:5

PPULSE_

LEN

(011)

Proximity pulse length.

Value

Pulse Length

0 (000)

1μs

1 (001)

2μs

2 (010)

4μs

3 (011)

8μs

4 (100)

12μs

5 (101)

16μs

6 (110)

24μs

7 (111)

32μs

Reserved

Reserved. Must be set to default value

3:0

PLDRIVE

(0000)

This field sets the drive strength of the IR VCSEL current.

Values are approximate; actual current through VCSEL is

factory trimmed to normalize IR intensity. For lowest part

to part variation, 7mA is recommended.

Value

VCSEL Current

5 (0101)

7mA

6 (0110)

8mA

7 (0111)

9mA

8 (1000)

10mA

All other values

Reserved

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