Ambient Light / Proximity Sensor
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11
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14
“Prox Interrupt” Sub Tab
This tab contains the settings for controlling the generation of Prox interrupts to a control processor.
The PILT and PIHT values are
16 bit thresholds for the upper
and lower trigger points. Each is
set using two 8-bit register
Another control (PPERS)
establishes the required
persistence of the interrupt
signal.
s.
Also on this screen is a control
that will automatically generate
the register values to provide
threshold settings 25% higher
and lower than the Proximity
Data Register value.
•
Proximity Interrupt Low Threshold (0x04, 0x05) – Low threshold for proximity interrupt.
1.
PILTL (0x08) – The lower 8 bits of the 16 bit low threshold value.
2.
PILTH (0x09) – The upper 8 bits of the 16 bit low threshold value.
•
Proximity Interrupt High Threshold (0x06, 0x07) – High threshold for proximity interrupt.
1.
PIHTL (0x0A) – The lower 8 bits of the 16 bit high threshold value.
2.
PIHTH (0x0B) – The upper 8 bits of the 16 bit high threshold value.
•
PERS (0x0C) – The PPERS field (bits 7:4) allows the number of times the Prox interrupt
threshold (PILT, PIHT) is exceeded before the interrupt is generated to be controlled. Setting
a zero means an interrupt is generated on every proximity reading.
•
The +/-25% button takes the current Proximity Data Register value and automatically
computes new values for the PILT and PIHT registers, each with a 25% wider latitude.
