Datasheet

 2011-2013 Microchip Technology Inc. DS70657G-page 415
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
TABLE 30-22: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Symbol Characteristic
(1)
Min. Typ.
(2)
Max. Units Conditions
SY00 T
PU Power-up Period — 400 600 s
SY10 T
OST Oscillator Start-up Time — 1024 TOSC ——TOSC = OSC1 period
SY12 TWDT Watchdog Timer
Time-out Period
0.85 — 1.15 ms WDTPRE = 0, WDTPOST = 0000,
using LPRC tolerances indicated
in F21 (see Table 30-20) at +85ºC
3.4 — 4.6 ms WDTPRE = 1, WDTPOST = 0000,
using LPRC tolerances indicated
in F21 (see Table 30-20) at +85ºC
SY13 TIOZ I/O High-Impedance
from MCLR
Low or
Watchdog Timer Reset
0.68 0.72 1.2 s
SY20 TMCLR MCLR Pulse Width (low) 2 — — s
SY30 TBOR BOR Pulse Width (low) 1 — — s
SY35 TFSCM Fail-Safe Clock Monitor
Delay
— 500 900 s -40°C to +85°C
SY36 T
VREG Voltage Regulator
Standby-to-Active mode
Transition Time
——30s
SY37 TOSCDFRC FRC Oscillator Start-up
Delay
46 48 54 s
SY38 T
OSCDLPRC LPRC Oscillator Start-up
Delay
——70s
Note 1: These parameters are characterized but not tested in manufacturing.
2: Data in “Typical” column is at 3.3V, +25°C unless otherwise stated.