TCS3472_17 Datasheet, PDF (17/40 Pages) ams AG – Red, Green, Blue (RGB), and Clear Light

TCS3472 − Principles of Operation
Figure 20:
Detailed State Diagram
System Timing
The system state machine shown in Figure 17 provides an
overview of the states and state transitions that provide system
control of the device. This section highlights the programmable
features, which affect the state machine cycle time, and
provides details to determine system level timing.
When the power management feature is enabled (WEN), the
state machine will transition to the Wait state. The wait time is
determined by WLONG, which extends normal operation by
12× when asserted, and WTIME. The formula to determine the
wait time is given in the box associated with the Wait state in
Figure 20.
When the RGBC feature is enabled (AEN), the state machine will
transition through the RGBC Init and RGBC ADC states. The
RGBC Init state takes 2.4 ms, while the RGBC ADC time is
dependent on the integration time (ATIME). The formula to
determine RGBC ADC time is given in the associated box in
Figure 20. If an interrupt is generated as a result of the RGBC
cycle, it will be asserted at the end of the RGBC ADC.
Notes:
1. There is a 2.4 ms warm-up delay if PON is enabled. If PON is not enabled, the device will return to the Sleep state as shown.
2. PON, WEN, and AEN are fields in the Enable register (0x00).
ams Datasheet
[v1-02] 2016-Feb-08
Page 17
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