TCS3471

COLOR LIGHT-TO-DIGITAL CONVERTER

TAOS115 − MARCH 2011

7

The LUMENOLOGY

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Copyright

E 2011, TAOS Inc.

www.taosinc.com

PRINCIPLES OF OPERATION

System State Machine

The TCS3471 provides control of RGBC and power management functionality through an internal state

machine (Figure 6). After a power-on-reset, the device is in the sleep mode. As soon as the PON bit is set, the

device will move to the start state. It will then continue through the Wait and RGBC states. If these states are

enabled, the device will execute each function. If the PON bit is set to 0, the state machine will continue until

all conversions are completed and then go into a low power sleep mode.

Sleep

Start

RGBC

Wait

PON = 1 (r 0:b0)

PON = 0 (r 0:b0)

Figure 6. Simplified State Diagram

NOTE: In this document, the nomenclature uses the bit field name in italics followed by the register number and

bit number to allow the user to easily identify the register and bit that controls the function. For example, the

power on (PON) is in register 0, bit 0. This is represented as PON (r0:b0).