C8051F331 Silicon Laboratories Inc, C8051F331 Datasheet - Page 4

• Manufacturer Part Number: C8051F331
• Description: IC 8051 MCU 8K FLASH 20MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F33xr

Specifications of C8051F331

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, 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
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

C8051F330/1, C8051F330D
10. Reset Sources......................................................................................................... 89
11. Flash Memory ......................................................................................................... 95
12. External RAM ........................................................................................................ 101
13. Oscillators ............................................................................................................. 103
14. Port Input/Output ................................................................................................ 113
15. SMBus ................................................................................................................... 125
4
9.3. Interrupt Handler ............................................................................................... 79
9.4. Power Management Modes .............................................................................. 87
10.1.Power-On Reset ............................................................................................... 90
10.2.Power-Fail Reset/VDD Monitor ........................................................................ 91
10.3.External Reset .................................................................................................. 92
10.4.Missing Clock Detector Reset .......................................................................... 92
10.5.Comparator0 Reset .......................................................................................... 92
10.6.PCA Watchdog Timer Reset ............................................................................ 92
10.7.Flash Error Reset ............................................................................................. 92
10.8.Software Reset ................................................................................................. 93
11.1.Programming The Flash Memory ..................................................................... 95
11.2.Non-volatile Data Storage ................................................................................ 97
11.3.Security Options ............................................................................................... 97
13.1.Programmable Internal High-Frequency (H-F) Oscillator ............................... 103
13.2.Programmable Internal Low-Frequency (L-F) Oscillator ................................ 105
13.3.External Oscillator Drive Circuit...................................................................... 106
13.4.System Clock Selection.................................................................................. 111
14.1.Priority Crossbar Decoder .............................................................................. 115
14.2.Port I/O Initialization ....................................................................................... 117
14.3.General Purpose Port I/O ............................................................................... 120
15.1.Supporting Documents ................................................................................... 126
15.2.SMBus Configuration...................................................................................... 126
9.2.5. Stack ....................................................................................................... 72
9.2.6. Special Function Registers....................................................................... 73
9.2.7. Register Descriptions ............................................................................... 76
9.3.1. MCU Interrupt Sources and Vectors ........................................................ 79
9.3.2. External Interrupts .................................................................................... 80
9.3.3. Interrupt Priorities ..................................................................................... 80
9.3.4. Interrupt Latency ...................................................................................... 80
9.3.5. Interrupt Register Descriptions................................................................. 81
9.4.1. Idle Mode.................................................................................................. 87
9.4.2. Stop Mode ................................................................................................ 88
11.1.1.Flash Lock and Key Functions ................................................................. 95
11.1.2.Flash Erase Procedure ............................................................................ 95
11.1.3.Flash Write Procedure ............................................................................. 96
13.2.1.Calibrating the Internal L-F Oscillator..................................................... 105
13.3.1.External Crystal Example....................................................................... 108
13.3.2.External RC Example............................................................................. 110
13.3.3.External Capacitor Example................................................................... 110
Rev. 1.2