TMD2621 datasheet(23/59 Pages) OSRAM

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[v4-00] 2023-Apr-12

TMD2621 − Register O ver view

PCFG2 Register (Address 0x90)

Figure 30:

PCFG2 Register

The PPULSE_LEN, PPULSE and PROX_DATA_AVG together

define the VCSEL emitting time within one proximity

measurement cycle. The VCSEL works in pulse mode and the

working duty cycle needs to be configured less than 5%. The

calculation formula for duty cycle is shown below:

Duty Cycle = {(PPULSE_LEN+2)*(PPULSE+1)*(2^PROX_DATA_

AVG)} / T_PROX, where the T_PROX is proximity measurement

repetition cycle, which is the time length in which the proximity

measurement occurs once and updates the PDATA results.

REVID Register (Address 0x91)

Figure 31:

REVID Register

Addr: 0x90

PCFG2

Bit

Bit Name

Default

Access

Bit Description

7:0

PPULSE_LENL

0x20

These bits are the 8 least significant bits of the 10-bit

Pulse Length control setting. The upper 2 bits are in

the PCFG1 register. See the PCFG1 register for details.

Pulse Length needs to be greater than 16μs.

Value

Pulse Length

14 (0000001110)

16μs

15 (0000001111)

17μs

Pulse Length = (PPULSE_LEN + 2)μs

1023 (1111111111)

1025μs

Addr: 0x91

REVID

Bit

Bit Name

Default

Access

Bit Description

7:5

Reserved

000

Reserved

4:3

FUNC_ID

Device function identification

2:0

REV_ID

001

Device revision number

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