MAX44000 Maxim, MAX44000 Datasheet - Page 11

• 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

This register is used to set the operating mode of the IC (ALS and/or proximity) and enable interrupt operation of the
device.
The 3-bit MODE[2:0] defines eight operating modes for the IC, as shown below.
Main Configuration
MODE[2:0]
BIT 5
BIT 1
BIT 2
0
1
0
1
0
1
000
001
010
011
100
101
110
111
REGISTER
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.
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.
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.
OPERATING
______________________________________________________________________________________
PROX Only
ALS/PROX
Shutdown
Reserved
Reserved
ALS G-IR
ALS IR
MODE
ALS G
Ambient and Infrared Proximity Sensor
B7
B6
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.
TRIM
B5
B4
MODE[2:0]
B3
OPERATION
OPERATION
OPERATION
B2
OPERATION
PRXINTE ALSINTE
B1
Main Configuration Register (0x01)
Proximity Interrupt Status (PRXINTS)
B0
Power-On Reset Status (PWRON)
REGISTER
ADDRESS
0x01
POWER-ON
RESET
STATE
0x24
MODE[2:0]
TRIM
R/W
R/W
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