TCS3430 Datasheet, PDF (15/38 Pages) ams AG – The device features advanced digital Ambient Light Sensing

TCS3430 − Register Description
Figure 22:
AILTH Register
Field
7:0
Name
AILTH
AILTH Register (0x85)
0x85: AILTH
Reset Type
Description
0x00
RW High Byte of the Low Threshold
This register provides the high byte of the low interrupt ALS
(Channel 0) threshold.
The contents of the AILTH and AILTL registers are combined and
treated as a sixteen bit threshold. If the value generated by
Channel 0 is below the low threshold specified and the APERS
value is reached, the aint bit is asserted which will assert the
INT pin if aien is set.
There is an 8-bit data latch implemented that stores the written
low byte until the high byte is written. Both bytes will be applied
then at the same time to avoid an invalid threshold (e.g. when
going from 0x00ff to 0x0100, the invalid intermediate value
0x0000 is suppressed. This implies that 1) the LSB cannot be
changed without writing to the MSB and 2) that writing to the
LSB of one 16-bit value and afterwards to the MSB of another
16-bit register will write all 16 bits to the MSB related register.
ams Datasheet
[v1-05] 2016-Aug-19
Page 15
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