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C8051T631 Datasheet(PDF) 4 Page - Silicon Laboratories |
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C8051T631 Datasheet(HTML) 4 Page - Silicon Laboratories |
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4 / 221 page  C8051T630/1/2/3/4/5 4 Rev. 1.0 15. Interrupts ................................................................................................................ 80 15.1. MCU Interrupt Sources and Vectors................................................................ 81 15.1.1. Interrupt Priorities.................................................................................... 81 15.1.2. Interrupt Latency ..................................................................................... 81 15.2. Interrupt Register Descriptions ........................................................................ 82 15.3. INT0 and INT1 External Interrupts................................................................... 87 16. EPROM Memory ..................................................................................................... 89 16.1. Programming and Reading the EPROM Memory ........................................... 89 16.1.1. EPROM Write Procedure ........................................................................ 89 16.1.2. EPROM Read Procedure........................................................................ 90 16.2. Security Options .............................................................................................. 90 16.3. Program Memory CRC .................................................................................... 91 16.3.1. Performing 32-bit CRCs on Full EPROM Content .................................. 91 16.3.2. Performing 16-bit CRCs on 256-Byte EPROM Blocks............................ 91 17. Power Management Modes................................................................................... 92 17.1. Idle Mode......................................................................................................... 92 17.2. Stop Mode ....................................................................................................... 93 17.3. Suspend Mode ................................................................................................ 93 18. Reset Sources ........................................................................................................ 95 18.1. Power-On Reset .............................................................................................. 96 18.2. Power-Fail Reset/VDD Monitor ....................................................................... 97 18.3. External Reset ................................................................................................. 98 18.4. Missing Clock Detector Reset ......................................................................... 98 18.5. Comparator0 Reset ......................................................................................... 99 18.6. PCA Watchdog Timer Reset ........................................................................... 99 18.7. EPROM Error Reset ........................................................................................ 99 18.8. Software Reset ................................................................................................ 99 19. Oscillators and Clock Selection ......................................................................... 101 19.1. System Clock Selection................................................................................. 101 19.2. Programmable Internal High-Frequency (H-F) Oscillator .............................. 103 19.2.1. Internal Oscillator Suspend Mode ......................................................... 103 19.3. Programmable Internal Low-Frequency (L-F) Oscillator ............................... 105 19.3.1. Calibrating the Internal L-F Oscillator.................................................... 105 19.4. External Oscillator Drive Circuit..................................................................... 106 19.4.1. External RC Example............................................................................ 108 19.4.2. External Capacitor Example.................................................................. 108 20. Port Input/Output ................................................................................................. 109 20.1. Port I/O Modes of Operation.......................................................................... 110 20.1.1. Port Pins Configured for Analog I/O...................................................... 110 20.1.2. Port Pins Configured For Digital I/O...................................................... 110 20.1.3. Interfacing Port I/O to 5V Logic ............................................................. 111 20.2. Assigning Port I/O Pins to Analog and Digital Functions............................... 112 20.2.1. Assigning Port I/O Pins to Analog Functions ........................................ 112 20.2.2. Assigning Port I/O Pins to Digital Functions.......................................... 112 20.2.3. Assigning Port I/O Pins to External Digital Event Capture Functions ... 113 |
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