PIC18LF2480ISP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF2480ISP

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

Microchip Technology 

PIC18F2480/2580/4480/4580

FIGURE 28-7:

VDD

MCLR

Internal

POR

PWRT

Time-out

OSC

Time-out

Internal

Reset

Watchdog

Timer

Reset

I/O pins

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND

POWER-UP TIMER TIMING

30

33

32

31

34

34

FIGURE 28-8:

BROWN-OUT RESET TIMING

VDD

VIRVST

Enable Internal

Reference Voltage

Internal Reference

Voltage Stable

BVDD

35

36

VBGAP = 1.2V

TABLE 28-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET REQUIREMENTS

Param.

No.

Sym

Characteristic

Min Typ Max Units

Conditions

30

TMCL MCLR Pulse Width (low)

2

—

—

μs

31

TWDT Watchdog Timer Time-out Period

(no postscaler)

3.4

4.0

4.6

ms

32

TOST Oscillator Start-up Timer Period

1024 TOSC — 1024 TOSC — TOSC = OSC1 period

33

TPWRT Power-up Timer Period

55.6 65.5

75

ms

34

TIOZ I/O High-Impedance from MCLR

Low or Watchdog Timer Reset

—

2

—

μs

35

TBOR Brown-out Reset Pulse Width

200

—

—

μs VDD ≤ BVDD (see D005)

36

TIRVST Time for Internal Reference Voltage

—

20

50

μs

to become Stable

37

TLVD High/Low-Voltage Detect Pulse

Width

200

—

—

μs VDD ≤ VLVD

38

TCSD CPU Start-up Time

—

10

—

μs

39

TIOBST Time for INTOSC to Stabilize

—

1

—

μs

© 2009 Microchip Technology Inc.

DS39637D-page 443

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