Datasheet

dsPIC33EPXXXGM3XX/6XX/7XX
DS70000689D-page 450  2013-2014 Microchip Technology Inc.
TABLE 33-21: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C  T
A  +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 µs
SY10 T
OST Oscillator Start-up Time — 1024 TOSC ——TOSC = OSC1 period
SY12 T
WDT Watchdog Timer
Time-out Period
0.85 — 1.15 ms WDTPRE = 0,
WDTPOST<3:0> = 0000,
Using LPRC tolerances indicated
in F21 (see Table 33-19) at +85°C
3.4 — 4.6 ms WDTPRE = 1,
WDTPOST<3:0> = 0000,
Using LPRC tolerances indicated
in F21 (see Table 33-19) at +85°C
SY13 T
IOZ I/O High-Impedance
from MCLR
Low or
Watchdog Timer Reset
0.68 0.72 1.2 µs
SY20 T
MCLR MCLR Pulse Width (low) 2 — — µs
SY30 T
BOR BOR Pulse Width (low) 1 — — µs
SY35 TFSCM Fail-Safe Clock Monitor
Delay
— 500 900 µs -40°C to +85°C
SY36 T
VREG Voltage Regulator
Standby-to-Active Mode
Transition Time
——30µs
SY37 T
OSCDFRC FRC Oscillator Start-up
Delay
——29µs
SY38 T
OSCDLPRC LPRC Oscillator Start-up
Delay
——70µs
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.