Rainbow Electronics MAX44000 - Manual (Page 11)

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MAX44000
Ambient and Infrared Proximity Sensor
Proximity Interrupt Status (PRXINTS)
Power-On Reset Status (PWRON)
Main Configuration Register (0x01)
This register is used to set the operating mode of the IC (ALS and/or proximity) and enable interrupt operation of the
device.
TRIM
MODE[2:0]
The 3-bit MODE[2:0] defines eight operating modes for the IC, as shown below.
BIT 1 OPERATION
0 No interrupt trigger event has occurred.
1
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.
BIT 2 OPERATION
0 No interrupt trigger event has occurred.
1
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 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
BIT 5 OPERATION
0
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.
1
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]
OPERATING
MODE
OPERATION
000 Shutdown Analog circuits are shut down, but the digital register retains values.
001 ALS G-IR
Standard ALS mode stores the difference between green and infrared channel readings.
Proximity channel operation and updates are disabled.
010 ALS G ALS green channel only. Proximity channel operation and updates are disabled.
011 ALS IR Infrared channel only. Proximity channel operation and updates are disabled.
100 ALS/PROX ALS and PROX are interleaved continuously.
101 PROX Only PROX only continuously. ALS channel operation and updates are disabled.
110 Reserved Do not use.
111 Reserved Do not use.