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LM3533 Graphical User Interface

7.5 ALS TAB

The Ambient Light Sensor (ALS) tab (Figure 12) contains all the registers that are applicable to the

LM3533's ALS interface. Table 25 through Table 34 describe these registers.

Figure 12. ALS Tab

Table 25. ALS Configuration (0x31)

Bits [5:3] Bit 2 Bit 1 Bit 0

ALS Average Times Fast startup Enable/Disable ALS Input Mode ALS Enable/Disable

000 = 17.92 ms 0 = ALS fast startup is enabled 0 = ALS is set for Analog 0 = ALS is disabled

001 = 35.84ms (Default) Sensor Input Mode (Default) (Default)

010 = 71.68ms 1 = ALS fast startup is disabled 1 = ALS is set for PWM Sensor 1 = ALS is enabled

011 = 143.36ms Input Mode

100 = 286.72ms (Default)

101 = 573.44ms

110 = 1146.88ms

111 = 2293.76ms

Table 26. Algorithm Select (0X32)

Bits [7:6] Bits [5:4] Bits [3:2] Bits [1:0]

PGEN ALSM3 ALSM2 ALSM1

00 = Direct Control (Default) 00 = Direct Control (Default) 00 = Direct Control (Default) 00 = Direct Control (default)

01 = Up Only Control 01 = Up Only Control 01 = Up Only 01 = Up Only

1X = Down Delay Control 1X = Down Delay Control 1X = Down Delay 1X = Down Delay

SLOA172B–June 2012–Revised April 2013 AN-2250 LM3533 Evaluation Kit

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