MAX44000 데이터 시트보기 (PDF) - Maxim Integrated

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MAX44000

Ambient and Infrared Proximity Sensor

Maxim Integrated 

MAX44000

Ambient and Infrared Proximity Sensor

BIT 1

0

1

BIT 2

0

1

Proximity Interrupt Status (PRXINTS)

No interrupt trigger event has occurred.

OPERATION

The IR proximity receive intensity has exceeded the threshold limit for greater than persist

timer count PRXPST[1:0]. This bit also causes the INT pin to be pulled low. Once set, the only way to clear this bit is

to read this register or to set PRXINTE bit to 0.

Power-On Reset Status (PWRON)

No interrupt trigger event has occurred.

OPERATION

The part went through a power-up event, either because the part was turned on or because there was a power-

supply voltage glitch. All interrupt threshold settings in the registers have been reset to a default state and should

be examined. A 1 on this bit also causes the INT pin to be pulled low. Note: INT is not pulled low on Rev-1 of the

IC. Once this bit is set, the only way to clear this bit is to read this register.

REGISTER

Main Configuration

Main Configuration Register (0x01)

B7 B6

B5

B4

B3

B2

B1

B0

REGISTER

ADDRESS

POWER-ON

RESET

STATE

R/W

TRIM

MODE[2:0]

PRXINTE ALSINTE 0x01

0x24

R/W

This register is used to set the operating mode of the IC (ALS and/or proximity) and enable interrupt operation of the

device.

BIT 5

0

1

TRIM

OPERATION

Use bytes written to TRIM_GAIN_GREEN[7:0] and TRIM_GAIN_IR[7:0] registers to set the fine-trim gain of the

green and IR gain channels.

Use factory-programmed gains for green and IR channels. Ignore bytes written to TRIM_GAIN_GREEN[7:0] and

TRIM_GAIN_IR[7:0] registers.

The 3-bit MODE[2:0] defines eight operating modes for the IC, as shown below.

MODE[2:0]

MODE[2:0]

000

001

010

011

100

101

110

111

OPERATING

MODE

Shutdown

ALS G-IR

ALS G

ALS IR

ALS/PROX

PROX Only

Reserved

Reserved

OPERATION

Analog circuits are shut down, but the digital register retains values.

Standard ALS mode stores the difference between green and infrared channel readings.

Proximity channel operation and updates are disabled.

ALS green channel only. Proximity channel operation and updates are disabled.

Infrared channel only. Proximity channel operation and updates are disabled.

ALS and PROX are interleaved continuously.

PROX only continuously. ALS channel operation and updates are disabled.

Do not use.

Do not use.

Maxim Integrated

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