TCS34711 TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS], TCS34711 Datasheet - Page 2

• Manufacturer Part Number: TCS34711
• Description: COLOR LIGHT-TO-DIGITAL CONVERTER
• Manufacturer: TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
TAOS115 − MARCH 2011
Functional Block Diagram
Detailed Description
Terminal Functions
2
Copyright E 2011, TAOS Inc.
NAME
GND
INT
NC
SCL
SDA
V
DD
TERMINAL
The TCS3471 light-to-digital device contains a 4 × 4 photodiode array, integrating amplifiers, ADCs,
accumulators, clocks, buffers, comparators, a state machine, and an I
is composed of red-filtered, green-filtered, blue-filtered, and clear photodiodes — four of each type. Four
integrating ADCs simultaneously convert the amplified photodiode currents to a digital value providing up to 16
bits of resolution. Upon completion of the conversion cycle, the conversion result is transferred to the data
registers. The transfers are double-buffered to ensure that the integrity of the data is maintained.
Communication to the device is accomplished through a fast (up to 400 kHz), two-wire I
connection to a microcontroller or embedded controller.
The TCS3471 provides a separate pin for level-style interrupts. When interrupts are enabled and a pre-set value
is exceeded, the interrupt pin is asserted and remains asserted until cleared by the controlling firmware. The
interrupt feature simplifies and improves system efficiency by eliminating the need to poll a sensor for a light
intensity value. An interrupt is generated when the value of an RGBC conversion exceeds either an upper or
lower threshold. In addition, a programmable interrupt persistence feature allows the user to determine how
many consecutive exceeded thresholds are necessary to trigger an interrupt.
V
NO.
DD
GND
3
5
4
2
6
1
TYPE
TYPE
I/O
O
I
Power supply ground. All voltages are referenced to GND.
Interrupt — open drain.
Do not connect
I
I
Supply voltage.
2
2
C serial clock input terminal — clock signal for I
C serial data I/O terminal — serial data I/O for I
Clear
Red
Green
Blue
r
Green ADC
Clear ADC
Blue ADC
Red ADC
www.taosinc.com
RGBC Control
Wait Control
Green Data
Clear Data
Blue Data
Red Data
DESCRIPTION
DESCRIPTION
2
2
C .
C serial data.
Upper Limit
Lower Limit
2
C interface. The 4 × 4 photodiode array
r
Interrupt
The LUMENOLOGY r Company
2
C serial bus for easy
SCL
SDA
INT