C8051F39x/37x
SFR Definition 12.1. REF0CN: Reference Control
Bit
7
6
5
4
3
2
1
0
REFBGS
REGOVR
REFSL
TEMPE
BIASE
REFBE
Name
Type
Reset
R/W
0
R
0
R
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
SFR Address = 0xD1; SFR Page = All Pages
Bit
Name
Function
Reference Buffer Gain Select.
7
REFBGS
This bit selects between 1x and 2x gain for the on-chip voltage ref-
erence buffer.
0: 2x Gain
1: 1x Gain
6:5
4
Unused
Read = 00b; Write = Don’t care.
REGOVR
Regulator Reference Override.
This bit “overrides” the REFSL bit, and allows the internal regulator
to be used as a reference source.
0: The voltage reference source is selected by the REFSL bit.
1: The internal regulator is used as the voltage reference.
3
REFSL
Voltage Reference Select.
This bit selects the ADCs voltage reference.
0: V
pin used as voltage reference.
REF
1: V used as voltage reference.
DD
2
1
0
TEMPE
BIASE
REFBE
Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
Internal Analog Bias Generator Enable Bit.
0: Internal Bias Generator off.
1: Internal Bias Generator on.
On-chip Reference Buffer Enable Bit.
0: On-chip Reference Buffer off.
1: On-chip Reference Buffer on. Internal voltage reference driven
on the V
pin.
REF
72
Preliminary Rev. 0.71
SILICON [ SILICON ]
