C8051F121 Silicon Laboratories Inc, C8051F121 Datasheet - Page 99
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C8051F121
Manufacturer Part Number
C8051F121
Description
IC 8051 MCU FLASH 128K 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F12xr
Specifications of C8051F121
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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C8051F121
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C8051F121-GQ
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Bits7–0: ADC2 Data Word.
SFR Page:
SFR Address:
R/W
Bit7
–VREF * (128/128)
VREF * (255/256)
VREF * (128/256)
VREF * (127/128)
–VREF * (64/128)
Single-Ended Example:
8-bit ADC Data Word appears in the ADC2 Data Word Register as follows:
Example: ADC2 Data Word Conversion Map, Single-Ended AIN2.0 Input
Differential Example:
8-bit ADC Data Word appears in the ADC2 Data Word Register as follows:
Example: ADC2 Data Word Conversion Map, Differential AIN2.0-AIN2.1 Input
Code
VREF * (64/256)
VREF * (64/128)
Code
AIN2.0–AIN2.1
AIN2.0–AGND
2
0xBE
(Volts)
(Volts)
R/W
Bit6
=
(AMX2CF = 0x00; AMX2SL = 0x00)
0
(AMX2CF = 0x01; AMX2SL = 0x00)
0
=
Vin
Vin
SFR Definition 7.5. ADC2: ADC2 Data Word
Figure 7.4. ADC2 Data Word Example
R/W
Bit5
------------------------ -
2 V
-------------- -
VREF
Gain
REF
Gain
0x80 (-128d)
0xC0 (-64d)
ADC2
ADC2
256
0xFF
0x7F
0x80
0x40
0x00
0x40
0x00
R/W
Bit4
256
Rev. 1.4
R/W
Bit3
C8051F120/1/2/3/4/5/6/7
R/W
Bit2
C8051F130/1/2/3
R/W
Bit1
R/W
Bit0
00000000
Reset Value
99
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