PIC16LF870-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF870-I/SO

28/40-Pin, 8-Bit CMOS FLASH Microcontrollers

Microchip Technology 

PIC16F870/871

FIGURE 14-6: 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

I/O Pins

33

32

30

31

34

34

Note: Refer to Figure 14-3 for load conditions.

FIGURE 14-7: BROWN-OUT RESET TIMING

VDD

VBOR

35

TABLE 14-3: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,

AND BROWN-OUT RESET REQUIREMENTS

Parameter Sym Characteristic

No.

Min Typ† Max Units

Conditions

30

31*

32

33*

34

35

Legend: *

†

TmcL MCLR Pulse Width (low)

2

—

—

µs VDD = 5V, -40°C to +85°C

Twdt

Watchdog Timer Time-out Period

7

(No Prescaler)

18

33

ms VDD = 5V, -40°C to +85°C

Tost

Oscillation Start-up Timer Period

— 1024 TOSC —

— TOSC = OSC1 period

Tpwrt Power up Timer Period

28

72

132 ms VDD = 5V, -40°C to +85°C

TIOZ

I/O Hi-impedance from MCLR Low —

—

2.1

µs

or Watchdog Timer Reset

TBOR Brown-out Reset pulse width

100

—

—

µs VDD ≤ VBOR (D005)

These parameters are characterized but not tested.

Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

DS30569A-page 128

Preliminary

© 1999 Microchip Technology Inc.

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