PIC18F24K20-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F24K20-I/SO

28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC18F2XK20/4XK20

FIGURE 26-7:

RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND

POWER-UP TIMER TIMING

VDD

MCLR

Internal

POR

PWRT

Time-out

OSC

Time-out

Internal

Reset

Watchdog

Timer

Reset

33

32

I/O pins

Note: Refer to Figure 26-4 for load conditions.

30

31

34

34

FIGURE 26-8:

BROWN-OUT RESET TIMING

VDD

BVDD

35

VIVRST

Enable Internal

Reference Voltage

Internal Reference

Voltage Stable

36

VBGAP = 1.2V

TABLE 26-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER

AND BROWN-OUT RESET REQUIREMENTS

Param.

No.

Symbol

Characteristic

Min Typ Max Units

Conditions

30

TmcL MCLR Pulse Width (low)

2

—

—

s

31

TWDT Watchdog Timer Time-out Period

(no postscaler)

3.5

4.1

4.7

ms 1:1 prescaler

32

TOST Oscillation Start-up Timer Period 1024 TOSC — 1024 TOSC — TOSC = OSC1 period

33

TPWRT Power-up Timer Period

54.8 64.4 74.1

ms

34

TIOZ I/O High-Impedance from MCLR

Low or Watchdog Timer Reset

—

2

—

s

35

TBOR Brown-out Reset Pulse Width

200

—

—

s VDD  BVDD (see D005)

36

TIVRST Internal Reference Voltage Stable

—

25

35

s

37

THLVD High/Low-Voltage Detect Pulse Width 200

—

—

s VDD  VHLVD

38

TCSD CPU Start-up Time

5

—

10

s

39

TIOBST Time for HF-INTOSC to Stabilize

—

0.25

1

ms

DS41303G-page 388

 2010 Microchip Technology Inc.

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