LM3532TMX-40ANOPB National Semiconductor Corporation, LM3532TMX-40ANOPB Datasheet - Page 32

• Manufacturer Part Number: LM3532TMX-40ANOPB
• Description: High Efficiency White Led Driver With Programmable Ambient Light Sensing Capability And I2c-compatible Interface
• Manufacturer: National Semiconductor Corporation

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ALS1 & 2 RESISTOR SELECT
The ALS Resistor Select Registers program the internal pull-
down resistor at the ALS1/ALS2 input. Each ALS input has its
own resistor select register (ALS1 Resistor Select Register,
Address 0x20) and (ALS2 Resistor Select Register, Address
N/A
Not Used
Bit [7:5]
TABLE 15. ALS Resistor Select Register Description (Address 0x20, Address 0x21)
00000 = High Impedance (default)
00001 = 37 kΩ
00010 = 18.5 kΩ
00011 = 12.33 kΩ
00100 = 9.25 kΩ
00101 = 7.4 kΩ
00110 = 6.17 kΩ
00111 = 5.29 kΩ
01000 = 4.63 kΩ
01001 = 4.11 kΩ
01010 = 3.7 kΩ
01011 = 3.36 kΩ
01100 = 3.08 kΩ
01101 = 2.85 kΩ
01110 = 2.64 kΩ
01111 = 2.44 kΩ
10000 = 2.31 kΩ
10001 = 2.18 kΩ
10010 = 2.06 kΩ
10011 = 1.95 kΩ
10100 = 1.85 kΩ
10101 = 1.76 kΩ
10110 = 1.68 kΩ
10111 = 1.61 kΩ
11000 = 1.54 kΩ
11001 = 1.48 kΩ
11010 = 1.42 kΩ
11011 = 1.37 kΩ
11100 = 1.32 kΩ
11101 = 1.28 kΩ
11110 = 1.23 kΩ
11111 = 1.19 kΩ
ALS1/ALS2 Resistor Select Bits
32
0x21). Each ALS input can be set independent of the other.
There are 32 available resistors including a high impedance
setting. The full-scale input voltage range at either ALS input
is 2V.
Bit [4:0]