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ATmega1284 Datasheet

8-bit AVR Microcontrollers

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10.4. Full Swing Crystal Oscillator.......................................................................................................45
10.5. Low Frequency Crystal Oscillator...............................................................................................46
10.6. Calibrated Internal RC Oscillator................................................................................................47
10.7. 128kHz Internal Oscillator.......................................................................................................... 48
10.8. External Clock............................................................................................................................ 49
10.9. Timer/Counter Oscillator.............................................................................................................50
10.10. Clock Output Buffer....................................................................................................................50
10.11. System Clock Prescaler............................................................................................................. 50
10.12. Register Description...................................................................................................................51
11. PM - Power Management and Sleep Modes........................................................... 55
11.1. Overview.....................................................................................................................................55
11.2. Sleep Modes...............................................................................................................................55
11.3. BOD Disable...............................................................................................................................56
11.4. Idle Mode....................................................................................................................................56
11.5. ADC Noise Reduction Mode.......................................................................................................56
11.6. Power-Down Mode.....................................................................................................................57
11.7. Power-save Mode.......................................................................................................................57
11.8. Standby Mode............................................................................................................................ 58
11.9. Extended Standby Mode............................................................................................................ 58
11.10. Power Reduction Registers........................................................................................................58
11.11. Minimizing Power Consumption................................................................................................. 58
11.12. Register Description................................................................................................................... 60
12. SCRST - System Control and Reset....................................................................... 67
12.1. Resetting the AVR...................................................................................................................... 67
12.2. Reset Sources............................................................................................................................67
12.3. Power-on Reset..........................................................................................................................68
12.4. External Reset............................................................................................................................69
12.5. Brown-out Detection...................................................................................................................69
12.6. Watchdog System Reset............................................................................................................ 70
12.7. Internal Voltage Reference.........................................................................................................70
12.8. Watchdog Timer......................................................................................................................... 71
12.9. Register Description................................................................................................................... 73
13. Interrupts................................................................................................................. 77
13.1. Overview.....................................................................................................................................77
13.2. Interrupt Vectors in ATmega1284............................................................................................... 77
13.3. Register Description................................................................................................................... 80
14. External Interrupts................................................................................................... 83
14.1. EXINT - External Interrupts........................................................................................................ 83
15. I/O-Ports.................................................................................................................. 95
15.1. Overview.....................................................................................................................................95
15.2. Ports as General Digital I/O........................................................................................................96
15.3. Alternate Port Functions.............................................................................................................99
15.4. Register Description................................................................................................................. 112
Atmel ATmega1284 [DATASHEET]
Atmel-42718B-ATmega1284_Datasheet_Complete-08/2016
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