Microchip Technology dsPIC30F - Page 4

DS70046C-page iv  2004 Microchip Technology Inc.
PAGE
SECTION 6. RESET INTERRUPTS 6-1
Introduction ...................................................................................................................................................... 6-2
Non-Maskable Traps ........................................................................................................................................ 6-6
Interrupt Processing Timing ........................................................................................................................... 6-11
Interrupt Control and Status Registers ........................................................................................................... 6-14
Interrupt Setup Procedures ............................................................................................................................ 6-42
Design Tips .................................................................................................................................................... 6-44
Related Application Notes .............................................................................................................................. 6-45
Revision History ............................................................................................................................................. 6-46
SECTION 7. OSCILLATOR 7-1
Introduction ...................................................................................................................................................... 7-2
CPU Clocking Scheme ..................................................................................................................................... 7-4
Oscillator Configuration .................................................................................................................................... 7-5
Oscillator Control Register (OSCCON) ............................................................................................................ 7-6
Primary Oscillator ............................................................................................................................................. 7-9
Crystal Oscillators/Ceramic Resonators ......................................................................................................... 7-10
Determining Best Values for Crystals, Clock Mode, C1, C2 and Rs .............................................................. 7-12
External Clock Input ....................................................................................................................................... 7-13
External RC Oscillator .................................................................................................................................... 7-14
Phase Locked Loop (PLL) .............................................................................................................................. 7-18
Low Power 32 kHz Crystal Oscillator ............................................................................................................. 7-19
Oscillator Start-up Timer (OST) ...................................................................................................................... 7-19
Internal Fast RC Oscillator (FRC) .................................................................................................................. 7-19
Internal Low Power RC (LPRC) Oscillator ..................................................................................................... 7-20
Fail-Safe Clock Monitor (FSCM) .................................................................................................................... 7-20
Programmable Oscillator Postscaler .............................................................................................................. 7-21
Clock Switching Operation ............................................................................................................................. 7-22
Design Tips .................................................................................................................................................... 7-26
Related Application Notes .............................................................................................................................. 7-27
Revision History ............................................................................................................................................. 7-28
SECTION 8. RESET 8-1
Introduction ...................................................................................................................................................... 8-2
Clock Source Selection at Reset ...................................................................................................................... 8-5
POR: Power-on Reset ...................................................................................................................................... 8-5
External Reset (EXTR) ..................................................................................................................................... 8-7
Software RESET Instruction (SWR) ................................................................................................................. 8-7
Watchdog Time-out Reset (WDTR) ................................................................................................................. 8-7
Brown-out Reset (BOR) ................................................................................................................................... 8-8
Using the RCON Status Bits .......................................................................................................................... 8-10
Device Reset Times ....................................................................................................................................... 8-11
Device Start-up Time Lines ............................................................................................................................ 8-13
Special Function Register Reset States ......................................................................................................... 8-16
Design Tips .................................................................................................................................................... 8-17
Related Application Notes .............................................................................................................................. 8-18
Revision History ............................................................................................................................................. 8-19
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