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MAX44000
Ambient and Infrared Proximity Sensor
Proximity Interrupt Enable (PRXINTE)
BIT 1
0
1
BIT 0
0
1
OPERATION
The PRXINTS bit remains unasserted, and proximity channel readings are not compared with interrupt thresholds.
Detection of a proximity interrupt event triggers a hardware interrupt ( INT pin is pulled low) and sets the PRXINTS
bit (register 0x00, B1). Proximity channel readings are compared with proximity interrupt threshold settings and
proximity persist timer.
Ambient Interrupt Enable (ALSINTE)
OPERATION
The ALSINTS bit remains unasserted, and ALS channel readings are not compared with interrupt thresholds.
Detection of an ambient light interrupt event triggers a hardware interrupt ( INT pin is pulled low) and sets the
ALSINTS bit (register 0x00, B0). ALS channel readings are compared with ALS interrupt threshold settings and
ALS persist timer.
Receive Configuration Register (0x02)
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REGISTER
ADDRESS
POWER-ON
RESET
STATE
R/W
Receive Configuration
1
1
1
1
ALSTIM[1:0]
ALSPGA[1:0]
0x02
0x00
R/W
This register sets the ADC integration time and front-end photodiode circuitry sensitivity (gain) for the ALS channel.
The ADC integration time also controls the bit resolution of measurements. ADC conversions are made of MSB first
(the IC needs longer conversion times for higher resolution measurements). Use of lower PGA gains helps expand the
full-scale range of the ADC at the expense of per-LSB sensitivity.
12
Maxim Integrated
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