TLE6711 데이터 시트보기 (PDF) - Infineon Technologies

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TLE6711

Multifunctional Voltage Regulator and Watchdog

Infineon Technologies 

TLE 6711

Circuit Description

a) Perfect Triggering after Power on Reset

VCC

VRT

tRD = 64 Cycles

t

RO

32 Cycles

t

WDWI

CW OW CW OW CW CW

32 Cycles

t

WDI

xx

xx xx

xx

xx xx

SEN

t1

t2 t3

t

System Failed

System Enable

System Failed

b) Incorrect Triggering

t

tWDR = 64 Cycles

tSR = 64 Cycles

tSR = 64 Cycles

RO

t

TWD = 128 Cycles

WDWI

CW OW

CW OW

CW OW CW OW

t

32 Cycles

WDI

xx x

xx x

xx

xx x xx

x

xx

1)

2)

3)

SEN

4)

t

1) Pretrigger

2) Incorrect trigger duration within watchdog

3)

open window OW: tHIGH < 2 Cycles

Incorrect trigger duration within watchdog

4)

open window OW:

Missing trigger

tLOW

<

2

Cycles

t

Legend: WDWI = Internal Watchdog Window

OW = Open Window (trigger signal at WDI)

CW = Closed Window (trigger signal at WDI)

x = Sample Point

AED02945

Figure 7 Window Watchdog Function

Data Sheet

10

Rev. 3.4, 2007-08-16

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