C8051F120-TB Silicon Laboratories Inc, C8051F120-TB Datasheet - Page 114

• Manufacturer Part Number: C8051F120-TB
• Description: BOARD PROTOTYPING W/C8051F120
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F120-TB

• Contents: Board
• Processor To Be Evaluated: C8051F12x and C8051F13x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F120
• Silicon Family Name: C8051F12x
• Kit Contents: Board
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F120
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
114
Bits7–5: UNUSED. Read = 000b; Write = don’t care.
Bit4:
Bit3:
Bit2:
Bit1:
Bit0:
SFR Page:
SFR Address:
Figure 9.1. Voltage Reference Functional Block Diagram (C8051F120/2/4/6)
R/W
Bit7
-
SFR Definition 9.1. REF0CN: Reference Control (C8051F120/2/4/6)
AD0VRS: ADC0 Voltage Reference Select.
0: ADC0 voltage reference from VREF0 pin.
1: ADC0 voltage reference from DAC0 output.
AD2VRS: ADC2 Voltage Reference Select.
0: ADC2 voltage reference from VREF2 pin.
1: ADC2 voltage reference from AV+.
TEMPE: Temperature Sensor Enable Bit.
0: Internal Temperature Sensor Off.
1: Internal Temperature Sensor On.
BIASE: ADC/DAC Bias Generator Enable Bit. (Must be ‘1’ if using ADC, DAC, or VREF).
0: Internal Bias Generator Off.
1: Internal Bias Generator On.
REFBE: Internal Reference Buffer Enable Bit.
0: Internal Reference Buffer Off.
1: Internal Reference Buffer On. Internal voltage reference is driven on the VREF pin.
0
0xD1
R/W
Bit6
Reference
-
External
Voltage
Circuit
DGND
VDD
Recommended Bypass
4.7F
R1
R/W
Capacitors
Bit5
+
-
0.1F
AD0VRS AD2VRS
VREFD
VREF2
VREF0
VREF
R/W
Bit4
Rev. 1.4
R/W
Bit3
REF0CN
DAC0
DAC1
Ref
REFBE
x2
AV+
TEMPE
R/W
Bit2
1
0
0
1
Band-Gap
BIASE
1.2V
EN
ADC2
Ref
ADC0
Ref
BIASE
R/W
Bit1
Bias to
ADCs,
DACs
REFBE
R/W
Bit0
00000000
Reset Value