C8051F131R Silicon Labs, C8051F131R Datasheet - Page 80

• 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

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
80
Bits7–3: AD0SC4–0: ADC0 SAR Conversion Clock Period Bits.
Bits2–0: AMP0GN2–0: ADC0 Internal Amplifier Gain (PGA).
SFR Page:
SFR Address:
AD0SC4
R/W
Bit7
SAR Conversion clock is derived from system clock by the following equation, where
AD0SC refers to the 5-bit value held in AD0SC4-0, and CLK
SAR clock (Note: the ADC0 SAR Conversion Clock should be less than or equal to
2.5 MHz).
When the AD0SC bits are equal to 00000b, the SAR Conversion clock is equal to SYSCLK
to facilitate faster ADC conversions at slower SYSCLK speeds.
000: Gain = 1
001: Gain = 2
010: Gain = 4
011: Gain = 8
10x: Gain = 16
11x: Gain = 0.5
AD0SC
0
0xBC
AD0SC3
R/W
Bit6
SFR Definition 6.3. ADC0CF: ADC0 Configuration
=
------------------------------- - 1
2 C
AD0SC2
 LK
SYSCLK
R/W
Bit5
SAR0
AD0SC1
R/W
Bit4
–
Rev. 1.4
AD0SC0 AMP0GN2 AMP0GN1 AMP0GN0 11111000
R/W
Bit3

R/W
AD0SC 00000b
Bit2
SAR0

R/W
Bit1
refers to the desired ADC0

R/W
Bit0
Reset Value