PIC16LC621A-04/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC621A-04/SO

EPROM-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62X

FIGURE 12-14:

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

TIMER TIMING

VDD

MCLR

Internal

POR

PWRT

Timeout

OSC

Timeout

Internal

RESET

Watchdog

Timer

RESET

I/O Pins

33

32

30

31

34

34

FIGURE 12-15: BROWN-OUT RESET TIMING

VDD

BVDD

35

TABLE 12-5: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP

TIMER REQUIREMENTS

Parameter

No.

Sym

Characteristic

Min

Typ†

Max Units

Conditions

30

TmcL MCLR Pulse Width (low)

2000

—

31

Twdt

Watchdog Timer Time-out Period

7*

18

(No Prescaler)

—

ns -40° to +85°C

33* ms VDD = 5.0V, -40° to +85°C

32

Tost

Oscillation Start-up Timer Period

— 1024 TOSC —

— TOSC = OSC1 period

33

Tpwrt Power-up Timer Period

28*

72

132* ms VDD = 5.0V, -40° to +85°C

34

TIOZ

I/O hi-impedance from MCLR low

—

2.0 µs

35

TBOR Brown-out Reset Pulse Width

100*

—

—

µs 3.7V ≤ VDD ≤ 4.3V

*

These parameters are characterized but not tested.

†

Data in "Typ" column is at 5.0V, 25°C, unless otherwise stated. These parameters are for design guidance only and are

not tested.

 2003 Microchip Technology Inc.

DS30235J-page 107

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