LM3530 datasheet(32/50 Pages) TI1

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Bit 0

Data

Zone Boundary Register 0 (ZB0)

Address 0x60, Default Value 0x33

MSB

LSB

Bit 1

Data

Bit 2

Data

Bit 3

Data

Bit 4

Data

Bit 5

Data

Bit 6

Data

Bit 7

Data

Bit 0

Data

Zone Boundary Register 1 (ZB1)

Address 0x61, Default Value 0x66

MSB

LSB

Bit 1

Data

Bit 2

Data

Bit 3

Data

Bit 4

Data

Bit 5

Data

Bit 6

Data

Bit 7

Data

Bit 0

Data

Zone Boundary Register 2 (ZB2)

Address 0x62, Default Value 0x99

MSB

LSB

Bit 1

Data

Bit 2

Data

Bit 3

Data

Bit 4

Data

Bit 5

Data

Bit 6

Data

Bit 7

Data

Bit 0

Data

Zone Boundary Register 3 (ZB3)

Address 0x63, Default Value 0xCC

MSB

LSB

Bit 1

Data

Bit 2

Data

Bit 3

Data

Bit 4

Data

Bit 5

Data

Bit 6

Data

Bit 7

Data

LM3530

SNVS606L – JUNE 2009 – REVISED DECEMBER 2014

www.ti.com

8.6.1.7 Zone Boundary Register

The Zone Boundary Registers are programmed with the ambient light sensing zone boundaries. The default

values are set at 20% (200 mV), 40% (400 mV), 60% (600 mV), and 80% (800 mV) of the full-scale ALS input

voltage range (1V). The necessary conditions for proper ALS operation are that the data in ZB0 < data in ZB1 <

data in ZB2 < data in ZB3.

Figure 47. Zone Boundary Registers

8.6.1.8 Zone Target Registers

The Zone Target Registers contain the LED brightness data that corresponds to the current active ALS zone.

The default values for these registers and their corresponding percentage of full-scale current for both linear and

exponential brightness is shown in Figure 48 and Table 11.

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