TCS3414CS TAOS, TCS3414CS Datasheet - Page 31

• Manufacturer Part Number: TCS3414CS
• Description: Photodiodes TriColor Sensor RGB, Clear Ch
• Manufacturer: TAOS
• Type: Digital Color Light Sensorr

Specifications of TCS3414CS

• Peak Wavelength: 470 nm
• Maximum Rise Time: 300 ns
• Maximum Fall Time: 300 ns
• Package / Case: Chipscale-6
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Product: Ambient Light Sensor
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

// Generate an interrupt
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The following example pseudo code illustrates the configuration of an SMB-Alert style interrupt when the light
intensity changes 20% from the current value, and persists for 2.5 seconds:
In order to generate an interrupt on demand during system test or debug, a test mode (INTR = 11) can be used.
The following example illustrates how to generate an interrupt on demand:
//Assume Interrupt Source as Channel 1
//Read current light level
Address = 0x39
Command = 0xB0
ReadWord (Address, Command, DataLow, DataHigh)
Channel1 = (256 * DataHigh) + DataLow
//Calculate upper and lower thresholds
T_Upper = Channel1 + (0.2 * Channel1)
T_Lower = Channel1 − (0.2 * Channel1)
//Write the lower threshold register
Command = 0xA8
WriteWord (Address, Command, T_Lower.LoByte, T_Lower.HiByte)
//Write the upper threshold register
Command = 0xAA
WriteWord (Address, Command, T_Upper.LoByte, T_Upper.HiByte)
//Enable interrupt
Command = 0x82
Data = 0x24
WriteByte(Address, Command, Data)
Address = 0x39
Command = 0x82
Data = 0x30
WriteByte(Address, Command, Data)
//Interrupt line should now be low
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//Slave address − alternatively 0x29 or 0x49
//Set Command bit and SMBus Word read
//Address lower threshold register, set Word Bit
//Address upper threshold register, set Word bit
//Address interrupt register
//SMBAlert style, Persist 2.5 seconds
//Slave address alternately 0x29 or 0x49
//Address Interrupt Control Register
//Test interrupt
DIGITAL COLOR LIGHT SENSORS
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TCS3404CS, TCS3414CS
TAOS068 − FEBRUARY 2009
Copyright E 2009, TAOS Inc.
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