TSL2569CS datasheet(32/56 Pages) OSRAM

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ams Datasheet

Page 31

[v1-00] 2016-Apr-12

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TSL2568, TSL2569 − Application Information: Software

Basic Operation

After applying VDD, the device will initially be in the

power-down state. To operate the device, issue a command to

access the Control Register followed by the data value 03h to

power up the device. At this point, both ADC channels will begin

a conversion at the default integration time of 400ms. After

400ms, the conversion results will be available in the DATA0 and

DATA1 registers. Use the following pseudo code to read the data

registers:

// Read ADC Channels Using Read Word Protocol − RECOMMENDED

Address = 0x39

//Slave addr – also 0x29 or 0x49

//Address the Ch0 lower data register and configure for Read Word

Command = 0xAC

//Set Command bit and Word bit

//Reads two bytes from sequential registers 0x0C and 0x0D

//Results are returned in DataLow and DataHigh variables

ReadWord (Address, Command, DataLow, DataHigh)

Channel0 = 256 * DataHigh + DataLow

//Address the Ch1 lower data register and configure for Read Word

Command = 0xAE

//Set bit fields 7 and 5

//Reads two bytes from sequential registers 0x0E and 0x0F

//Results are returned in DataLow and DataHigh variables

ReadWord (Address, Command, DataLow, DataHigh)

Channel1 = 256 * DataHigh + DataLow

//Shift DataHigh to upper byte

// Read ADC Channels Using Read Byte Protocol

Address = 0x39

//Slave addr − also 0x29 or 0x49

Command = 0x8C

//Address the Ch0 lower data register

ReadByte (Address, Command, DataLow)

//Result returned in DataLow

Command = 0x8D

//Address the Ch0 upper data register

ReadByte (Address, Command, DataHigh)

//Result returned in DataHigh

Channel0 = 256 * DataHigh + DataLow

//Shift DataHigh to upper byte

Command = 0x8E

//Address the Ch1 lower data register

ReadByte (Address, Command, DataLow)

//Result returned in DataLow

Command = 0x8F

//Address the Ch1 upper data register

ReadByte (Address, Command, DataHigh)

//Result returned in DataHigh

Channel1 = 256 * DataHigh + DataLow

//Shift DataHigh to upper byte

Application Information:

Software

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