TCS3414CS TAOS, TCS3414CS Datasheet - Page 9

• 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

Analog-to-Digital Converter
Digital Interface
NOTE: The slave and SMB Alert addresses are 7 bits. Please note the SMBus and I
Interrupt
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The TCS3404/14 contains four integrating analog-to-digital converters (ADC) that integrate the currents from
the four photodiodes (channel 1 through channel 4). Integration of all four channels occurs simultaneously, and
upon completion of the conversion cycle the conversion results are transferred to the channel data registers,
respectively. The transfers are double-buffered to ensure that invalid data is not read during the transfer. After
the transfer, the device automatically begins the next integration cycle.
There are two ways to control the integration cycles: internally timed and externally timed. Internally-timed
integration cycles can either be continuous back-to-back conversions or can be externally triggered as a single
event using the SYNC pin. Externally-timed integrations can be controlled by setting and clearing a register bit
(i.e. ADC_EN in Control Register) using the serial interface, or by 1 or more pulses input to the SYNC pin.
Integration options are configured through the Timing Register (see the Timing Register section for more
information).
Interface and control of the TCS3404/14 is accomplished through a two-wire serial interface to a set of registers
that provide access to device control functions and output data. The serial interface is compatible with System
Management Bus (SMBus) versions 1.1 and 2.0, and I
The standard color device supports a single slave address outlined in Table 1. Please contact TAOS for
additional slave address options.
Although the ADC channel data registers can be read at any time to obtain the most recent conversion value,
in some applications, periodic polling of the device may not be desirable. For these types of applications, the
device supports a variety of interrupt options allowing the user to configure the device to signal when a change
in light intensity has occurred. High and low threshold registers allow a range of light levels to be defined, outside
of which the device generates an interrupt. A persistence setting allows the user to specify a time duration that
the measured value must remain outside of the defined range before generating an interrupt. The interrupt
function can be assigned to any one of the four ADC color channels. See Interrupt Control Register for more
information on configuring the interrupt functions.
be appended to the slave address by the master device to communicate properly with the device.
SLAVE ADDRESS
0111001
PRINCIPLES OF OPERATION
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Table 1. Slave Address
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2
SMB ALERT ADDRESS
C bus Fast-Mode.
0001100
2
C protocols on the following pages. A read/write bit should
DIGITAL COLOR LIGHT SENSORS
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TCS3404CS, TCS3414CS
TAOS068 − FEBRUARY 2009
Copyright E 2009, TAOS Inc.
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