TMF8701 datasheet(26/66 Pages) OSRAM

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Datasheet, Public

Page 25

[v2-00] 2023-Feb-21

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TMF8701 − Register Description

cmd_data4 = If cmd_data5 enables VCSEL pulse output

for GPIO0 and/or GPIO1, cmd_data4 sets its timings as

follows. If set to non-zero, GPIO1 shows the VCSEL pulse;

additionally the GPIO1 signal can be set to be asserted

before the VCSEL pulse starts

‘0’ - No signal,

‘1’ - GPIOx, rises 0

μs time before VCSEL pulse starts

‘2’ - GPIOx rises 100

μs before VCSEL pulse,

‘3’ - GPIOx rises 200

μs before VCSEL pulse and so on.

The falling edge of GPIOx happens at the same time the

VCSEL stops emitting light.

cmd_data3 = Reserved for future, use 0x00.

cmd_data2 = Repetition period in ms, use 0 for single

measurement; if the repetition period is set lower than

the ranging time for this mode, the TMF8701 runs at it

maximum possible speed (best effort approach).

cmd_data1 = Reserved for future, use 0xFF

cmd_data0 = Reserved for future, use 0xFF

Once a measurement is finished the interrupt is asserted if

it is enabled by int1_enab. Additionally the transaction ID

tid is updated.

0x04

Set flag to perform distance measurement (no proximity

algorithm is used) with 5 bytes of data containing where:

cmd_data4 = If set to non-zero, GPIO1 shows the VCSEL

pulse; additionally the GPIO1 signal can be set to be

asserted before the VCSEL pulse starts,

0 for no signal,

‘1’=0

μs time before VCSEL pulse

‘2’=GPIO1 starts 100

μs before VCSEL pulse,

‘3’= GPIO1 starts 200

μs before VCSEL pulse.

cmd_data3 = Reserved for future, use 0x00

cmd_data2 = Repetition period in ms, use 0 for single

ranging; if the repetition period is set lower than the

ranging time for this mode, the TMF8701 runs at it

maximum possible speed (best effort approach)

cmd_data1 = Reserved for future, use 0xFF

cmd_data0 = Reserved for future, use 0xFF

Once a measurement is finished the interrupt is asserted if

it is enabled by int1_enab. Additionally the transaction ID

tid is updated.

0x10: COMMAND

Field

Name

Reset

Type

Description

TMF8701 数据表(PDF) 26 Page - OSRAM GmbH

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