C8051F300 Datasheet, PDF (48/176 Pages) List of Unclassifed Manufacturers – Mixed Signal ISP Flash MCU Family

C8051F300/1/2/3/4/5
SFR Definition 6.1. REF0CN: Reference Control Register
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset Value
—
—
—
—
REFSL TEMPE BIASE
— 00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0 SFR Address:
0xD1
Bits7–3:
Bit3:
Bit2:
Bit1:
Bit0:
UNUSED. Read = 00000b; Write = don’t care.
REFSL: Voltage Reference Select.
This bit selects the source for the internal voltage reference.
0: VREF input pin used as voltage reference.
1: V_DD used as voltage reference.
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
V_DD = 3.0 V; –40 to +85°C unless otherwise specified.
Parameter
Conditions
Min Typ
Max
Input Voltage Range
Input Current
Sample Rate = 500 ksps;
VREF = 3.0 V
0
—
V_DD
—
12
—
Units
V
µA
48
Rev. 2.8