PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 65

• Manufacturer Part Number: PIC24FJ128GB
• Description: 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
• Manufacturer: MICROCHIP [Microchip Technology]

TABLE 5-1:
5.1
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 7.0 “Oscillator Configuration” for
further details.
TABLE 5-2:
© 2008 Microchip Technology Inc.
TRAPR (RCON<15>)
IOPUWR (RCON<14>)
CM (RCON<9>)
EXTR (RCON<7>)
SWR (RCON<6>)
WDTO (RCON<4>)
SLEEP (RCON<3>)
IDLE (RCON<2>)
BOR (RCON<1>)
POR (RCON<0>)
Note:
Reset Type
WDTO
MCLR
SWR
POR
BOR
Clock Source Selection at Reset
All Reset flag bits may be set or cleared by the user software.
Flag Bit
FNOSC Configuration bits
(CW2<10:8>)
COSC Control bits
(OSCCON<14:12>)
RESET FLAG BIT OPERATION
OSCILLATOR SELECTION vs.
TYPE OF RESET (CLOCK
SWITCHING ENABLED)
Clock Source Determinant
Trap Conflict Event
Illegal Opcode or Uninitialized W Register Access
Configuration Mismatch Reset
MCLR Reset
RESET Instruction
WDT Time-out
PWRSAV #SLEEP Instruction
PWRSAV #IDLE Instruction
POR, BOR
POR
PIC24FJ256GB110 FAMILY
Setting Event
Preliminary
5.2
The Reset times for various types of device Reset are
summarized in Table 5-3. Note that the system Reset
signal, SYSRST, is released after the POR and PWRT
delay times expire.
The time at which the device actually begins to execute
code will also depend 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 SYSRST delay times.
The FSCM delay determines the time at which the
FSCM begins to monitor the system clock source after
the SYSRST signal is released.
Device Reset Times
PWRSAV Instruction, POR
Clearing Event
POR
POR
POR
POR
POR
POR
POR
DS39897B-page 63
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