C8051F300/1/2/3/4/5
4 Rev. 2.3
8.3.4. Interrupt Latency....................................................................................................68
8.3.5. Interrupt Register Descriptions..............................................................................70
8.4. Power Management Modes .............................................................................................75
8.4.1. Idle Mode...............................................................................................................75
8.4.2. Stop Mode..............................................................................................................75
9. RESET SOURCES ................................................................................................................77
9.1. Power-On Reset...............................................................................................................78
9.2. Power-Fail Reset / VDD Monitor....................................................................................78
9.3. External Reset..................................................................................................................79
9.4. Missing Clock Detector Reset .........................................................................................79
9.5. Comparator0 Reset ..........................................................................................................79
9.6. PCA Watchdog Timer Reset ...........................................................................................79
9.7. FLASH Error Reset .........................................................................................................79
9.8. Software Reset.................................................................................................................80
10. FLASH MEMORY ................................................................................................................83
10.1.Programming The FLASH Memory ...............................................................................83
10.1.1. FLASH Lock and Key Functions ..........................................................................83
10.1.2. FLASH Erase Procedure........................................................................................83
10.1.3. FLASH Write Procedure .......................................................................................84
10.2.Non-volatile Data Storage ...............................................................................................85
10.3.Security Options ..............................................................................................................85
11. OSCILLATORS.....................................................................................................................89
11.1.Programmable Internal Oscillator ...................................................................................89
11.2.External Oscillator Drive Circuit.....................................................................................91
11.3.System Clock Selection...................................................................................................91
11.4.External Crystal Example................................................................................................93
11.5.External RC Example......................................................................................................93
11.6.External Capacitor Example............................................................................................93
12. PORT INPUT/OUTPUT .......................................................................................................95
12.1.Priority Crossbar Decoder ...............................................................................................96
12.2.Port I/O Initialization.......................................................................................................98
12.3.General Purpose Port I/O...............................................................................................101
13. SMBUS..................................................................................................................................103
13.1.Supporting Documents ..................................................................................................104
13.2.SMBus Configuration....................................................................................................104
13.3.SMBus Operation ..........................................................................................................105
13.3.1. Arbitration............................................................................................................105
13.3.2. Clock Low Extension...........................................................................................106
13.3.3. SCL Low Timeout ...............................................................................................106
13.3.4. SCL High (SMBus Free) Timeout.......................................................................106
13.4.Using the SMBus...........................................................................................................107
13.4.1. SMBus Configuration Register............................................................................108
13.4.2. SMB0CN Control Register..................................................................................111
13.4.3. Data Register........................................................................................................114
13.5.SMBus Transfer Modes.................................................................................................115