C8051F131R Silicon Labs, C8051F131R Datasheet - Page 186

• 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
Electrical specifications for the precision internal oscillator are given in Table 14.1. Note that the system
clock may be derived from the programmed internal oscillator divided by 1, 2, 4, or 8, as defined by the
IFCN bits in register OSCICN.
186
Bits 7–0: OSCICL: Internal Oscillator Calibration Register.
Bit 7:
Bit 6:
Bits 5–2: Reserved.
Bits 1–0: IFCN1-0: Internal Oscillator Frequency Control Bits.
IOSCEN
R/W
Bit7
R/W
Bit7
This register calibrates the internal oscillator period. The reset value for OSCICL defines the
internal oscillator base frequency. The reset value is factory calibrated to generate an inter-
nal oscillator frequency of 24.5 MHz.
IOSCEN: Internal Oscillator Enable Bit.
0: Internal Oscillator Disabled.
1: Internal Oscillator Enabled.
IFRDY: Internal Oscillator Frequency Ready Flag.
0: Internal Oscillator not running at programmed frequency.
1: Internal Oscillator running at programmed frequency.
00: Internal Oscillator is divided by 8.
01: Internal Oscillator is divided by 4.
10: Internal Oscillator is divided by 2.
11: Internal Oscillator is divided by 1.
SFR Definition 14.1. OSCICL: Internal Oscillator Calibration.
IFRDY
SFR Definition 14.2. OSCICN: Internal Oscillator Control
R/W
Bit6
Bit6
R
R/W
R/W
Bit5
Bit5
-
R/W
Bit4
Bit4
R
-
Rev. 1.4
R/W
Bit3
R/W
Bit3
-
R/W
Bit2
R/W
Bit2
-
IFCN1
R/W
R/W
Bit1
Bit1
SFR Address:
SFR Address:
SFR Page:
SFR Page:
IFCN0
R/W
R/W
Bit0
Bit0
0x8B
F
0x8A
F
Reset Value
11000000
Reset Value
Variable