TMD3702VC datasheet(28/57 Pages) AMSCO

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Datasheet, Public

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[v2-00] 2023-Mar-14

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TMD3702VC − Register Description

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. If the PPULSE_LEN_

16x bit in CFG0 is asserted, then the pulse length is extended

by a factor of 16 times.

The PPULSE field sets the maximum number of IR VCSEL pulses

that may occur in a proximity cycle. The proximity engine will

automatically continue to add IR VCSEL pulses, up to the value

set in PPULSE or if a near-saturation condition occurs. The

dynamic range of the sensor is automatically adjusted to detect

distant targets as well as prevent saturation from close targets.

This operation also reduces power consumption because

proximity integration period is automatically shortened when

a target is either too close or far from the sensor.

If Automatic Pulse Control (APC) is disabled by setting bit 6 in

CFG6 to 1, then PPULSE always determines the number of

proximity to be transmitted.

5:0

PPLUSE

(001111)

Maximum number of pulses in a single proximity cycle.

Value

Maximum Number of Pulses

0 (000000)

1 (000001)

2 (000010)

……

63 (111111)

Addr: 0x8E

PCFG0

Bit

Bit Name

Default

Access

Bit Description

TMD3702VC bảng dữ liệu(PDF) 28 Page - ams AG