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MAX44000
Ambient and Infrared Proximity Sensor
Proximity Interrupt Status (PRXINTS)
BIT 1
0
1
BIT 2
0
1
OPERATION
No interrupt trigger event has occurred.
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)
OPERATION
No interrupt trigger event has occurred.
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.
Main Configuration Register (0x01)
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REGISTER
ADDRESS
POWER-ON
RESET
STATE
R/W
Main Configuration
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.
TRIM
BIT 5
0
1
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.
MODE[2:0]
The 3-bit MODE[2:0] defines eight operating modes for the IC, as shown below.
MODE[2:0]
000
001
010
011
100
101
110
111
Maxim Integrated
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.
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