C8051F380/1/2/3/4/5/6/7/C
SFR Definition 7.1. REF0CN: Reference Control
Bit
Name
Type
Reset
7
REFBGS
R/W
0
6
R
0
5
R
0
4
REGOVR
R/W
0
3
REFSL
R/W
0
2
TEMPE
R/W
0
1
BIASE
R/W
0
0
REFBE
R/W
0
SFR Address = 0xD1; SFR Page = All Pages
Bit Name
Function
7
REFBGS Reference Buffer Gain Select.
This bit selects between 1x and 2x gain for the on-chip voltage reference buffer.
0: 2x Gain
1: 1x Gain
6:5
Unused
Read = 00b; Write = don’t care.
4
REGOVR Regulator Reference Override.
This bit “overrides” the REFSL bit, and allows the internal regulator to be used as a ref-
erence source.
0: The voltage reference source is selected by the REFSL bit.
1: The internal regulator is used as the voltage reference.
3
2
1
0
REFSL
TEMPE
BIASE
REFBE
Voltage Reference Select.
This bit selects the ADCs voltage reference.
0: V REF pin used as voltage reference.
1: V DD used as voltage reference.
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 REF pin.
Rev. 1.4
63
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