Microchip Technology dsPIC30F - dsPIC QEI Features Overview; QEI Signal Decoding and Accumulation; Input Swapping and Noise Filters; Counting Modes and Registers

 2004 Microchip Technology Inc. DS70046C-page v
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SECTION 9. LOW VOLTAGE DETECT (LVD) 9-1
Introduction ...................................................................................................................................................... 9-2
LVD Operation ................................................................................................................................................. 9-5
Design Tips ...................................................................................................................................................... 9-6
Related Application Notes ................................................................................................................................ 9-7
Revision History ............................................................................................................................................... 9-8
SECTION 10. WATCHDOG TIMER AND POWER SAVING MODES 10-1
Introduction .................................................................................................................................................... 10-2
Power Saving Modes ..................................................................................................................................... 10-2
Sleep Mode .................................................................................................................................................... 10-2
Idle Mode ....................................................................................................................................................... 10-4
Interrupts Coincident with Power Save Instructions ....................................................................................... 10-5
Watchdog Timer ............................................................................................................................................. 10-6
Design Tips .................................................................................................................................................... 10-9
Related Application Notes ............................................................................................................................ 10-10
Revision History ........................................................................................................................................... 10-11
SECTION 11. I/O PORTS 11-1
Introduction .................................................................................................................................................... 11-2
I/O Port Control Registers .............................................................................................................................. 11-3
Peripheral Multiplexing ................................................................................................................................... 11-4
Port Descriptions ............................................................................................................................................ 11-5
Change Notification (CN) Pins ....................................................................................................................... 11-5
CN Operation in Sleep and Idle Modes .......................................................................................................... 11-6
Related Application Notes .............................................................................................................................. 11-9
Revision History ........................................................................................................................................... 11-10
SECTION 12. TIMERS 12-1
Introduction .................................................................................................................................................... 12-2
Timer Variants ................................................................................................................................................ 12-3
Control Registers ........................................................................................................................................... 12-6
Modes of Operation ........................................................................................................................................ 12-9
Timer Prescalers .......................................................................................................................................... 12-14
Timer Interrupts ............................................................................................................................................ 12-14
Reading and Writing 16-bit Timer Module Registers .................................................................................... 12-15
Low Power 32 kHz Crystal Oscillator Input .................................................................................................. 12-15
32-bit Timer Configuration ............................................................................................................................ 12-16
32-bit Timer Modes of Operation ................................................................................................................. 12-18
Reading and Writing into 32-bit Timers ........................................................................................................ 12-21
Timer Operation in Power Saving States ..................................................................................................... 12-21
Peripherals Using Timer Modules ................................................................................................................ 12-22
Design Tips .................................................................................................................................................. 12-24
Related Application Notes ............................................................................................................................ 12-25
Revision History ........................................................................................................................................... 12-26
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