C8051F131R Silicon Labs, C8051F131R Datasheet - Page 99

• Manufacturer Part Number: C8051F131R
• Description: 8-bit Microcontrollers - MCU 128kB 100MIPS 8448B RAM
• Manufacturer: Silicon Labs

Specifications of C8051F131R

• Product Category: 8-bit Microcontrollers - MCU
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 100 MHz
• Program Memory Size: 128 KB
• Data Ram Size: 8.25 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 3.6 V
• Package / Case: TQFP-64
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 9
• Data Rom Size: 64 KB
• Interface Type: I2C, SMBus, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Processor Series: C8051
• Program Memory Type: Flash
• Factory Pack Quantity: 500
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V

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