C8051F980-C-GM Datasheet, PDF (90/325 Pages) Silicon Laboratories – Ultra Low Power, 8-2 kB Flash, Capacitive Sensing MCU

C8051F99x-C8051F98x
SFR Definition 5.15. REF0CN: Voltage Reference Control
Bit
7
6
5
4
3
2
1
0
Name
REFGND
REFSL
TEMPE
Type
R
R
R/W
R/W
R/W
R/W
R
R
Reset
0
0
0
1
1
0
0
0
SFR Page = 0x0; SFR Address = 0xD1
Bit Name
Function
7:6 Unused Read = 00b; Write = Don’t Care.
5 REFGND Analog Ground Reference.
Selects the ADC0 ground reference.
0: The ADC0 ground reference is the GND pin.
1: The ADC0 ground reference is the P0.1/AGND pin.
4:3 REFSL Voltage Reference Select.
Selects the ADC0 voltage reference.
00: The ADC0 voltage reference is the P0.0/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 1.65 V high speed voltage reference.
2 TEMPE Temperature Sensor Enable.
Enables/Disables the internal temperature sensor.
0: Temperature Sensor Disabled.
1: Temperature Sensor Enabled.
1:0 Unused Read = 00b; Write = Don’t Care.
5.14. Voltage Reference Electrical Specifications
See Table 4.12 on page 61 for detailed Voltage Reference Electrical Specifications.
90
Rev. 1.2