PIC18F4685-ISLASHSP datasheet(440/484 Pages) MICROCHIP

Part #	PIC18F4685-I/SP

Description	28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PDF	484 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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440 / 484 page

PIC18F2682/2685/4682/4685

DS39761B-page 438

Preliminary

FIGURE 27-7:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND

POWER-UP TIMER TIMING

FIGURE 27-8:

BROWN-OUT RESET TIMING

TABLE 27-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET REQUIREMENTS

Param.

No.

Sym

Characteristic

Min

Typ

Max

Units

Conditions

TMCLMCLR Pulse Width (low)

—

μs

TWDT

Watchdog Timer Time-out Period (no

postscaler)

3.4

4.00

4.6

TOST

Oscillation Start-up Timer Period

1024 TOSC

—

1024 TOSC

—TOSC = OSC1 period

TPWRT

Power-up Timer Period

55.6

65.5

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)

TIRVST

Time for Internal Reference Voltage to

become stable

—20

μs

TLVD

High/Low-Voltage Detect Pulse Width

200

—

μsVDD ≤ VLVD

TCSD

CPU Start-up Time

—

μs

TIOBST

Time for INTOSC to stabilize

—

μs

VDD

MCLR

Internal

POR

PWRT

Time-out

OSC

Time-out

Internal

Reset

Watchdog

Timer

Reset

I/O pins

Note:

Refer to Figure 27-4 for load conditions.

VDD

BVDD

VBGAP = 1.2V

VIRVST

Enable Internal

Internal Reference

Reference Voltage

Voltage Stable

PIC18F4685-I/SP Datasheet(PDF) 440 Page - Microchip Technology

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