C8051F330D Silicon Laboratories Inc, C8051F330D Datasheet - Page 104

• Manufacturer Part Number: C8051F330D
• Description: IC 8051 MCU 8K FLASH 20DIP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F33xr

Specifications of C8051F330D

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1155

C8051F330/1, C8051F330D
104
Bit7:
Bits 6-0: OSCICL: Internal Oscillator Calibration Register.
Bit7:
Bit6:
Bits5-2:
Bits1-0:
IOSCEN
R/W
Bit7
Bit7
R
-
UNUSED. Read = 0. Write = don’t care.
This register determines the internal oscillator period. When set to 0000000b, the H-F oscil-
lator operates at its fastest setting. When set to 1111111b, the H-F oscillator operates at its
slowest setting. On C8051F330/1, C8051F330D devices, the reset value is factory cali-
brated to generate an internal oscillator frequency of 24.5 MHz.
IOSCEN: Internal H-F Oscillator Enable Bit.
0: Internal H-F Oscillator Disabled.
1: Internal H-F Oscillator Enabled.
IFRDY: Internal H-F Oscillator Frequency Ready Flag.
0: Internal H-F Oscillator is not running at programmed frequency.
1: Internal H-F Oscillator is running at programmed frequency.
UNUSED. Read = 0000b, Write = don't care.
IFCN1-0: Internal H-F Oscillator Frequency Control Bits.
00: SYSCLK derived from Internal H-F Oscillator divided by 8.
01: SYSCLK derived from Internal H-F Oscillator divided by 4.
10: SYSCLK derived from Internal H-F Oscillator divided by 2.
11: SYSCLK derived from Internal H-F Oscillator divided by 1.
IFRDY
R/W
Bit6
Bit6
R
Figure 13.2. OSCICL: Internal H-F Oscillator Calibration Register
Figure 13.3. OSCICN: Internal H-F Oscillator Control Register
R/W
Bit5
Bit5
R
-
R/W
Bit4
Bit4
R
-
Rev. 1.2
R/W
Bit3
Bit3
R
-
R/W
Bit2
Bit2
R
-
IFCN1
R/W
R/W
Bit1
Bit1
IFCN0
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
Reset Value
11000000
Reset Value
Variable
0xB2
0xB3