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TCS34725FN View Datasheet(PDF) - austriamicrosystems AG

Part Name
Description
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TCS34725FN
AMSCO
austriamicrosystems AG AMSCO
TCS34725FN Datasheet PDF : 40 Pages
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TCS3472 − Principles of Operation
The registers for programming the integration and wait times
are a 2’s compliment values. The actual time can be calculated
as follows:
ATIME = 256 − Integration Time / 2.4 ms
Inversely, the time can be calculated from the register value as
follows:
Integration Time = 2.4 ms × (256 − ATIME)
For example, if a 100-ms integration time is needed, the device
needs to be programmed to:
256 − (100 / 2.4) = 256 − 42 = 214 = 0xD6
Conversely, the programmed value of 0xC0 would correspond
to:
(256 − 0xC0) × 2.4 = 64 × 2.4 = 154 ms.
Interrupts
The interrupt feature simplifies and improves system efficiency
by eliminating the need to poll the sensor for light intensity
values outside of a user-defined range. While the interrupt
function is always enabled and its status is available in the
status register (0x13), the output of the interrupt state can be
enabled using the RGBC interrupt enable (AIEN) field in the
enable register (0x00).
Two 16-bit interrupt threshold registers allow the user to set
limits below and above a desired light level. An interrupt can
be generated when the Clear data (CDATA) is less than the Clear
interrupt low threshold (AILTx) or is greater than the Clear
interrupt high threshold (AIHTx).
It is important to note that the thresholds are evaluated in
sequence, first the low threshold, then the high threshold. As a
result, if the low threshold is set above the high threshold, the
high threshold is ignored and only the low threshold is
evaluated.
ams Datasheet
[v1-02] 2016-Feb-08
Page 15
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