MAX44000 Maxim, MAX44000 Datasheet - Page 12

• Manufacturer Part Number: MAX44000
• Description: MAX44000 combines a wide-dynamic range ambient light sensor with an integrated infrared proximity sensor, making it a perfect solution for touch-screen portable devices
• Manufacturer: Maxim

Ambient and Infrared Proximity Sensor
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
Receive Configuration
BIT 0
BIT 1
_____________________________________________________________________________________
0
1
0
1
REGISTER
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.
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.
B7
1
B6
1
B5
1
B4
1
ALSTIM[1:0]
B3
OPERATION
OPERATION
B2
Receive Configuration Register (0x02)
ALSPGA[1:0]
B1
Proximity Interrupt Enable (PRXINTE)
Ambient Interrupt Enable (ALSINTE)
B0
REGISTER
ADDRESS
0x02
POWER-ON
RESET
STATE
0x00
R/W
R/W