C8051F850-C-GM Datasheet, PDF (120/328 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

Register 14.14. REF0CN: Voltage Reference Control
Bit
7
6
5
4
3
2
1
0
Name IREFLVL Reserved GNDSL
REFSL
TEMPE
Reserved
Type
RW
R
RW
RW
RW
R
Reset
0
0
0
1
1
0
0
0
SFR Address: 0xD1
Table 14.17. REF0CN Register Bit Descriptions
Bit
Name
Function
7
IREFLVL Internal Voltage Reference Level.
Sets the voltage level for the internal reference source.
0: The internal reference operates at 1.65 V nominal.
1: The internal reference operates at 2.4 V nominal.
6
Reserved Must write reset value.
5
GNDSL Analog Ground Reference.
Selects the ADC0 ground reference.
0: The ADC0 ground reference is the GND pin.
1: The ADC0 ground reference is the AGND pin.
4:3
REFSL Voltage Reference Select.
Selects the ADC0 voltage reference.
00: The ADC0 voltage reference is the VREF pin.
01: The ADC0 voltage reference is the VDD pin.
10: The ADC0 voltage reference is the internal 1.8 V digital supply voltage.
11: The ADC0 voltage reference is the internal voltage reference.
2
TEMPE Temperature Sensor Enable.
Enables/Disables the internal temperature sensor.
0: Temperature Sensor Disabled.
1: Temperature Sensor Enabled.
1:0
Reserved Must write reset value.
106
Rev. 1.0