C8051F310/1/2/3/4/5/6/7
SFR Definition 6.1. REF0CN: Reference Control
R/W
Bit7
R/W
Bit6
R/W
Bit5
R/W
Bit4
R/W
REFSL
Bit3
R/W
TEMPE
Bit2
R/W
BIASE
Bit1
R/W
Bit0
Reset Value
00000000
SFR Address:
0xD1
Bits7–4: UNUSED. Read = 0000b; Write = don’t care.
Bit3:
REFSL: Voltage Reference Select.
This bit selects the source for the internal voltage reference.
0: VREF input pin used as voltage reference.
1: VDD used as voltage reference.
Bit2:
Bit1:
Bit0:
TEMPE: Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
BIASE: Internal Analog Bias Generator Enable Bit. (Must be ‘1’ if using ADC).
0: Internal Bias Generator off.
1: Internal Bias Generator on.
UNUSED. Read = 0b. Write = don’t care.
Table 6.1. External Voltage Reference Circuit Electrical Characteristics
VDD = 3.0 V; –40 to +85 °C unless otherwise specified
Parameter
Conditions
Min
Typ
Max
Units
0
VDD
V
Input Voltage Range
Sample Rate = 200 ksps;
VREF = 3.0 V
12
µA
Input Current
68
Rev. 1.7
SILICON [ SILICON ]
