C8051F336_08 Datasheet, PDF (4/227 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051F336/7/8/9
14. Special Function Registers................................................................................... 78
15. Interrupts ................................................................................................................ 82
15.1. MCU Interrupt Sources and Vectors................................................................ 83
15.1.1. Interrupt Priorities.................................................................................... 83
15.1.2. Interrupt Latency ..................................................................................... 83
15.2. Interrupt Register Descriptions ........................................................................ 84
15.3. External Interrupts /INT0 and /INT1................................................................. 89
16. Flash Memory......................................................................................................... 91
16.1. Programming The Flash Memory .................................................................... 91
16.1.1. Flash Lock and Key Functions ................................................................ 91
16.1.2. Flash Erase Procedure ........................................................................... 91
16.1.3. Flash Write Procedure ............................................................................ 92
16.2. Non-volatile Data Storage ............................................................................... 92
16.3. Security Options .............................................................................................. 93
16.4. Flash Write and Erase Guidelines ................................................................... 95
16.4.1. V_DD Maintenance and the V_DD monitor .................................................. 95
16.4.2. PSWE Maintenance ................................................................................ 95
16.4.3. System Clock .......................................................................................... 96
17. Reset Sources ...................................................................................................... 100
17.1. Power-On Reset ............................................................................................ 101
17.2. Power-Fail Reset / VDD Monitor ................................................................... 102
17.3. External Reset ............................................................................................... 103
17.4. Missing Clock Detector Reset ....................................................................... 103
17.5. Comparator0 Reset ....................................................................................... 104
17.6. PCA Watchdog Timer Reset ......................................................................... 104
17.7. Flash Error Reset .......................................................................................... 104
17.8. Software Reset .............................................................................................. 104
18. Power Management Modes................................................................................. 106
18.1. Idle Mode....................................................................................................... 106
18.2. Stop Mode ..................................................................................................... 107
18.3. Suspend Mode .............................................................................................. 107
19. Oscillators and Clock Selection ......................................................................... 109
19.1. System Clock Selection................................................................................. 109
19.2. Programmable Internal High-Frequency (H-F) Oscillator .............................. 111
19.2.1. Internal Oscillator Suspend Mode ......................................................... 111
19.3. Programmable Internal Low-Frequency (L-F) Oscillator ............................... 113
19.3.1. Calibrating the Internal L-F Oscillator.................................................... 113
19.4. External Oscillator Drive Circuit..................................................................... 114
19.4.1. External Crystal Example...................................................................... 116
19.4.2. External RC Example............................................................................ 117
19.4.3. External Capacitor Example.................................................................. 118
20. Port Input/Output ................................................................................................. 119
20.1. Port I/O Modes of Operation.......................................................................... 120
20.1.1. Port Pins Configured for Analog I/O...................................................... 120
20.1.2. Port Pins Configured For Digital I/O...................................................... 120
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