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PIC24HJ128GP310 Datasheet(PDF) 65 Page - Microchip Technology |
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PIC24HJ128GP310 Datasheet(HTML) 65 Page - Microchip Technology |
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65 / 286 page  © 2007 Microchip Technology Inc. DS70175F-page 63 PIC24HJXXXGPX06/X08/X10 TABLE 5-1: RESET FLAG BIT OPERATION 5.1 Clock Source Selection at Reset If clock switching is enabled, the system clock source at device Reset is chosen, as shown in Table 5-2. If clock switching is disabled, the system clock source is always selected according to the oscillator Configuration bits. Refer to Section 8.0 “Oscillator Configuration” for further details. TABLE 5-2: OSCILLATOR SELECTION vs. TYPE OF RESET (CLOCK SWITCHING ENABLED) 5.2 Device Reset Times The Reset times for various types of device Reset are summarized in Table 5-3. The system Reset signal is released after the POR and PWRT delay times expire. The time at which the device actually begins to execute code also depends on the system oscillator delays, which include the Oscillator Start-up Timer (OST) and the PLL lock time. The OST and PLL lock times occur in parallel with the applicable reset delay times. The FSCM delay determines the time at which the FSCM begins to monitor the system clock source after the reset signal is released. Flag Bit Setting Event Clearing Event TRAPR (RCON<15>) Trap conflict event POR IOPUWR (RCON<14>) Illegal opcode or uninitialized W register access POR EXTR (RCON<7>) MCLR Reset POR SWR (RCON<6>) RESET instruction POR WDTO (RCON<4>) WDT time-out PWRSAV instruction, POR SLEEP (RCON<3>) PWRSAV #SLEEP instruction POR IDLE (RCON<2>) PWRSAV #IDLE instruction POR BOR (RCON<1>) BOR — POR (RCON<0>) POR — Note: All Reset flag bits may be set or cleared by the user software. Reset Type Clock Source Determinant POR Oscillator Configuration bits (FNOSC<2:0>) BOR MCLR COSC Control bits (OSCCON<14:12>) WDTR SWR |
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