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Si1141/42/43
PS1_ADCMUX @ 0x07
Bit
7
6
5
4
3
2
1
0
Name
Type
Reset value = 0000 0011
PS1_ADCMUX[7:0]
RW
Bit
Name
Function
58
7:0
PS1_ADCMUX[7:0] Selects ADC Input for PS1 Measurement.
The following selections are valid when PS_ADC_MODE = 1 (default). This set-
ting is for normal Proximity Detection function.
0x03: Large IR Photodiode
0x00: Small IR Photodiode
In addition, the following selections are valid for PS_ADC_MODE = 0. With this
setting, irLED drives are disabled and the PS channels are no longer operating in
normal Proximity Detection function. The results have no reference and the refer-
ences needs to be measured in a separate measurement.
0x02: Visible Photodiode
A separate 'No Photodiode' measurement should be subtracted from this reading.
Note that the result is a negative value. The result should therefore be negated to
arrive at the Ambient Visible Light reading.
0x03: Large IR Photodiode
A separate “No Photodiode” measurement should be subtracted to arrive at
Ambient IR reading.
0x00: Small IR Photodiode
A separate “No Photodiode” measurement should be subtracted to arrive at
Ambient IR reading.
0x06: No Photodiode
This is typically used as reference for reading ambient IR or visible light.
0x25: GND voltage
This is typically used as the reference for electrical measurements.
0x65: Temperature
(Should be used only for relative temperature measurement. Absolute Tempera-
ture not guaranteed) A separate GND measurement should be subtracted from
this reading.
0x75: V DD voltage
A separate GND measurement is needed to make the measurement meaningful.
Rev. 1.3
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