NOA2301 Datasheet, PDF (14/19 Pages) ON Semiconductor – Digital Proximity Sensor

NOA2301
PS_CONFIG Register (0x15)
Proximity measurement sensitivity is controlled by
specifying the integration time. The integration time sets the
number of LED pulses during the modulated illumination.
The LED modulation frequency remains constant with a
period of 1.5 ms. Changing the integration time affects the
sensitivity of the detector and directly affects the power
consumed by the LED. The default is 1200 ms integration
period.
Hyst_enable and hyst_trigger work with the PS_TH
(threshold) settings to provide jitter control of the INT
function.
Table 17. PS_CONFIG Register (0x15)
Bit
7
6
5
4
3
Field
NA
hyst_enable hyst_trigger
NA
2
1
0
integration_time
Field
NA
hyst_enable
hyst_trigger
NA
integration_time
Bit
Default
Description
7:6
XX
Don’t Care
5
0
0
Disables hysteresis
1
Enables hysteresis
4
0
0
Lower threshold with hysteresis
1
Upper threshold with hysteresis
3
X
Don’t care
2:0
011
000 150 ms integration time
001 300 ms integration time
010 600 ms integration time
011 1200 ms integration time
100 1800 ms integration time
101 2400 ms integration time
110 3600 ms integration time
111 4800 ms integration time
PS_INTERVAL Register (0x16)
The PS_INTERVAL register sets the wait time between
consecutive proximity measurements in PS_Repeat mode.
The register is binary weighted times 10 in milliseconds plus
10 ms. The range is therefore 10 ms to 1.28 s. The default
startup value is 0x04 (50 ms).
Table 18. PS_INTERVAL Register (0x16)
Bit
7
6
5
4
3
2
1
0
Field
NA
interval
Field
NA
Interval
Bit
Default
Description
7
X
Don’t care
6:0
0x04
0x00 to 0x7F
Interval time between measurement cycles. Binary weighted value
times 10 ms plus a 10 ms offset.
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