C8051F304 View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
MFG CO.
'C8051F304' PDF : 177 Pages View PDF
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: VDD 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
VDD = 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
—
VDD
— 12
—
Units
V
µA
50
Rev. 2.9
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