C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 90

• Manufacturer Part Number: C8051F302
• Description: IC 8051 MCU 8K FLASH 11MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F30xr

Specifications of C8051F302

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 8
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 11-VQFN
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SMBus, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 8
• Number Of Timers: 16 bit
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

C8051F300/1/2/3/4/5
90
Bit7:
Bits 6-0: OSCICL: Internal Oscillator Calibration Register.
Bits7-5:
Bit4:
Bit3:
Bit2:
Bits1-0:
R/W
R/W
Bit7
Bit7
-
-
UNUSED. Read = 0. Write = don’t care.
This register calibrates the internal oscillator period. The reset value for OSCICL defines the internal
oscillator base frequency. On C8051F300/1 devices, the reset value is factory calibrated to generate
an internal oscillator frequency of 24.5 MHz.
UNUSED. Read = 000b, Write = don't care.
IFRDY: Internal Oscillator Frequency Ready Flag.
0: Internal Oscillator is not running at programmed frequency.
1: Internal Oscillator is running at programmed frequency.
CLKSL: System Clock Source Select Bit.
0: SYSCLK derived from the Internal Oscillator, and scaled as per the IFCN bits.
1: SYSCLK derived from the External Oscillator circuit.
IOSCEN: Internal Oscillator Enable Bit.
0: Internal Oscillator Disabled.
1: Internal Oscillator Enabled.
IFCN1-0: Internal Oscillator Frequency Control Bits.
00: SYSCLK derived from Internal Oscillator divided by 8.
01: SYSCLK derived from Internal Oscillator divided by 4.
10: SYSCLK derived from Internal Oscillator divided by 2.
11: SYSCLK derived from Internal Oscillator divided by 1.
Figure 11.2. OSCICL: Internal Oscillator Calibration Register
R/W
R/W
Bit6
Bit6
-
Figure 11.3. OSCICN: Internal Oscillator Control Register
R/W
R/W
Bit5
Bit5
-
IFRDY
R/W
Bit4
Bit4
R
Rev. 2.3
CLKSL
R/W
R/W
Bit3
Bit3
IOSCEN
R/W
R/W
Bit2
Bit2
IFCN1
R/W
R/W
Bit1
Bit1
IFCN0
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
00010100
Reset Value
Reset Value
Variable
0xB3
0xB2