TSL2672(2016) View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
TSL2672 Datasheet PDF : 46 Pages
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TSL2672 − Principles Of Operation
Figure 22:
Programmable Interrupt
Interrupts
The interrupt feature simplifies and improves system efficiency
by eliminating the need to poll the sensor for proximity values
outside 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 proximity interrupt enable (PIEN) field in the Enable register
(0x00).
Two 16-bit interrupt threshold registers allow the user to set
limits below and above a desired proximity range. An interrupt
can be generated when the proximity data (PDATA) is less than
the proximity interrupt low threshold (PILTx) or is greater than
the proximity interrupt high threshold (PIHTx).
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.
To further control when an interrupt occurs, the device provides
an interrupt persistence feature. The persistence filter allows
the user to specify the number of consecutive out-of-range
proximity occurrences before an interrupt is generated. The
persistence filter register (0x0C) allows the user to set the
proximity persistence filter (PPERS) values. See the persistence
filter register for details on the persistence filter values. Once
the persistence filter generates an interrupt, it will continue
until a special function interrupt clear command is received (see
Command Register).
PIHTH(r 0x0B), PIHTL(r 0x0A) PPERS(r 0x0C, b7:4)
Prox
Integration
Prox
ADC
Channel 0
Channel 1
Prox
Data
Upper Limit
Lower Limit
PILTH(r 0x09), PILTL(r 0x08)
Prox Persistence
ams Datasheet
[v1-00] 2016-Mar-23
Page 19
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