PIC18F4539-ESLASHMLSQTP datasheet(274/322 Pages) MICROCHIP

Part #	PIC18F4539-E/MLSQTP

Description	Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PDF	322 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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274 / 322 page

PIC18FXX39

DS30485A-page 272

Preliminary

 2002 Microchip Technology Inc.

FIGURE 23-7:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER TIMING

FIGURE 23-8:

BROWN-OUT RESET TIMING

TABLE 23-7:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET REQUIREMENTS

Param.

No.

Symbol

Characteristic

Min

Typ

Max

Units

Conditions

TmcL

MCLR Pulse Width (low)

—

µs

TWDT

Watchdog Timer Time-out Period (No

Postscaler)

718

TOST

Oscillation Start-up Timer Period

1024 TOSC

—

1024 TOSC

—TOSC = OSC1 period

TPWRT

Power up Timer Period

132

TIOZ

I/O high impedance from MCLR Low

or Watchdog Timer Reset

—2

—

µs

TBOR

Brown-out Reset Pulse Width

200

—

µsVDD ≤ BVDD (see D005)

TIVRST

Time for Internal Reference

Voltage to become stable

—20

500

µs

TLVD

Low Voltage Detect Pulse Width

200

—

µsVDD ≤ VLVD (see D420)

VDD

MCLR

Internal

POR

PWRT

Time-out

OSC

Time-out

Internal

Reset

Watchdog

Timer

Reset

I/O Pins

Note:

Refer to Figure 23-4 for load conditions.

VDD

BVDD

VBGAP = 1.2V

VIRVST

Enable Internal Reference Voltage

Internal Reference Voltage stable

Typical

PIC18F4539-E/MLSQTP Datasheet(PDF) 274 Page - Microchip Technology

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