TMD4903 Datasheet, PDF (52/86 Pages) ams AG – Color and Proximity Sensor Module with mobeam

TMD4903− RegisterDescription
Calibration Configuration Register One
(CALIBCFG1 0xD9)
Figure 64:
Calibration Configuration Register One
7
6
PXDCAVG_
AUTO_
GTHR
PROX_
AUTO_OFFSET_
ADJUST
5
4
Reserved
3
PXDCAVG_
AUTO_
BASELINE
2
1
0
PXDCAVG_BASELINE_WINDOW
Field
PXDCAVG_AUTO_GTHR
PROX_AUTO_OFFSET_ADJUST
Reserved
PXDCAVG_AUTO_BASELINE
PXDCAVG_BASELINE_WINDOW
Bits
7
6
5:4
3
2:0
Description
Proximity Automatic Thresholds. When asserted, GTHR_IN
and GTHR_OUT are automatically written with a multiple of
the PBSLN every time PBSLN changes. The multiplication
factor is set in AUTO_GTHR_IN_MULT. PBSLN can only change
if PXDCAVG_AUTO_BASELINE is asserted and PBSLN_MEAS is
less than PBSLN.
Proximity Auto Offset Adjust. If set, then during
proximity/gesture mode, whenever an ADC measurement is
zero, the appropriate offset register will be decreased. Will set
the OFFSET_ADJUSTED flag if it happens.
Reserved.
Proximity Automatic Baseline. When asserted,
PBSLN_MEAS is written to PBSLN whenever PBSLN_MEAS is
less than PBSLN. When this happens, the
BASELINE_ADJUSTED flag is raised. The default value is 1.
Prox Baseline Averaging Window. Sets the number of
proximity samples averaged to calculate PBSLN_MEAS, which
is updated at the end of each window. The default value is 16
samples.
VALUE
SAMPLES
0
Skip
1
2
2
4
…
n_Iterations = 2^{PXDCAVG_BASELINE_WINDOW}
6
64
7
128
Page 52
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[v1-12] 2015-May-14