PIC16C73B-20E/SO 查看數據表（PDF） - Microchip Technology

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PIC16C73B-20E/SO

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C63A/65B/73B/74B

FIGURE 16-7:

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 16-4 for load conditions.

30

31

34

34

FIGURE 16-8:

BROWN-OUT RESET TIMING

BVDD

VDD

35

TABLE 16-4: 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 VDD = 5V, -40°C to +125°C

31*

TWDT

Watchdog Timer Time-out

Period (No Prescaler)

7

18

33 ms VDD = 5V, -40°C to +125°C

32

TOST

Oscillation Start-up Timer

Period

— 1024 TOSC —

— TOSC = OSC1 period

33*

TPWRT Power-up Timer Period

28

72

132 ms VDD = 5V, -40°C to +125°C

34

TIOZ

I/O Hi-impedance from MCLR

Low or WDT Reset

—

—

2.1 µs

35

TBOR Brown-out Reset Pulse Width 100

—

—

µs VDD ≤ BVDD (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.

DS30605C-page 126

 2000 Microchip Technology Inc.

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