TC1232 데이터 시트보기 (PDF) - Microchip Technology

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TC1232

Microprocessor Monitor

Microchip Technology 

TC1232

tPB

ST

tST

tTD

PB RST

tPBD

VIL

RST

RST

VIH

tRST

RST (when tTD  tTD (min))

“H”

RST

(when tTD(min)  tTD  tTD(max))

RST

(when tTD  tTD(max))

The debounced PB RST input ignores input pulses less

than 1 ms and is designed to recognize pulses of

20 ms or greater.

RST (when tTD  tTD(min))

“L”

RST

(when tTD(min)  tTD  tTD(max))

RST

(when tTD  tTD(max))

FIGURE 1-2:

Push Button Reset and Watchdog Timer Reset Timing Waveforms.

AC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise noted, TA = TMIN to TMAX; VCC = +4.0V to 5.5V.

Parameters

Sym Min Typ Max Units

Conditions

PB RST Pulse Width

PB RST Falling Edge Low to

Reset Active

tPB

20

—

tPBD

1

4

—

ms Note 1

20

ms

PB RST Rising Edge High to

Reset Inactive

tRST

250 610

1000

ms

ST Pulse Width

ST Time-out Period

tST

20

—

—

ns

tTD

62.5 150

250

ms TD Pin = 0V

250 600 1000 ms TD Pin = Open

500 1200 2000 ms TD Pin = VCC

Note 1: PB RST must be held low for a minimum of 20 ms to ensure a reset.

DS21370D-page 4

Preliminary

 2002-2012 Microchip Technology Inc.

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