Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

ADM8692 Arkusz danych(PDF) 11 Page - Analog Devices

Numer części ADM8692
Szczegółowy opis  Microprocessor Supervisory Circuits
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

ADM8692 Arkusz danych(HTML) 11 Page - Analog Devices

Back Button ADM8692_15 Datasheet HTML 7Page - Analog Devices ADM8692_15 Datasheet HTML 8Page - Analog Devices ADM8692_15 Datasheet HTML 9Page - Analog Devices ADM8692_15 Datasheet HTML 10Page - Analog Devices ADM8692_15 Datasheet HTML 11Page - Analog Devices ADM8692_15 Datasheet HTML 12Page - Analog Devices ADM8692_15 Datasheet HTML 13Page - Analog Devices ADM8692_15 Datasheet HTML 14Page - Analog Devices ADM8692_15 Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 20 page
background image
ADM8690/ADM8691/ADM8692/ADM8693/ADM8695
Rev. B | Page 11 of 20
In addition to RESET, the ADM8691/ADM8693/ADM8695
contain an active high RESET output. This is the complement of
RESET and is intended for processors requiring an active high
reset signal.
WATCHDOG TIMER RESET
The watchdog timer circuit monitors the activity of the micro-
processor to check that it is not stalled in an indefinite loop. An
output line on the processor is used to toggle the watchdog input
(WDI) line. If this line is not toggled within the selected timeout
period, a RESET pulse is generated. The nominal watchdog
timeout period is preset at 1.6 seconds on the ADM8690 and
ADM8692. The ADM8691/ADM8693/ADM8695 can be
configured for either a fixed short 100 ms, or a long 1.6 second
timeout period, or for an adjustable timeout period. If the short
period is selected, some systems are unable to service the
watchdog timer immediately after a reset, so the ADM8691/
ADM8693/ADM8695 automatically select the long timeout
period directly after a reset is issued. The watchdog timer is
restarted at the end of reset, whether the reset was caused by
lack of activity on WDI or by VCC falling below the reset
threshold.
The normal (short) timeout period becomes effective following
the first transition of WDI after RESET has gone inactive. The
watchdog timeout period restarts with each transition on the
WDI pin. To ensure that the watchdog timer does not time out,
either a high-to-low or low-to-high transition on the WDI pin
must occur at, or less than, the minimum timeout period. If
WDI remains permanently either high or low, reset pulses are
issued after each long (1.6 s) timeout period. The watchdog
monitor can be deactivated by floating the watchdog input
(WDI) or by connecting it to midsupply.
WDI
WDO
RESET
t2
t1
t1
t3
t1
t1 = RESET TIME
t2 = NORMAL (SHORT) WATCHDOG TIMEOUT PERIOD
t3 = WATCHDOG TIMEOUT PERIOD IMMEDIATELY FOLLOWING A RESET
Figure 16. Watchdog Timeout Period and Reset Active Time
Table 5. ADM8691, ADM8693, ADM8695 Reset Pulse Width and Watchdog Timeout Selections
Watchdog Timeout Period
Reset Active Period
OSC SEL
OSC IN
Normal
Immediately After Reset
ADM8691/ADM8693
ADM8695
Low1
External clock input
1024 CLKs
4096 CLKs
512 CLKs
2048 CLKs
Low1
External capacitor
400 ms × C/47 pF
1.6 s × C/47 pF
200 ms × C/47 pF
520 ms × C/47 pF
Floating or high
Low
100 ms
1.6 s
50 ms
200 ms
Floating or high
Floating or high
1.6 s
1.6 s
50 ms
200 ms
1 With the OSC SEL pin low, OSC IN can be driven by an external clock signal, or an external capacitor (C) can be connected between OSC IN and GND. The nominal
internal oscillator frequency is 10.24 kHz. The nominal oscillator frequency with external capacitor is: FOSC (Hz) = 184,000/C (pF).


Podobny numer części - ADM8692_15

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
ADM8692AN AD-ADM8692AN Datasheet
207Kb / 16P
   Microprocessor Supervisory Circuits
REV. 0
ADM8692AN AD-ADM8692AN Datasheet
183Kb / 16P
   Microprocessor Supervisory Circuits
REV. 0
ADM8692ARN AD-ADM8692ARN Datasheet
207Kb / 16P
   Microprocessor Supervisory Circuits
REV. 0
ADM8692ARN AD-ADM8692ARN Datasheet
183Kb / 16P
   Microprocessor Supervisory Circuits
REV. 0
More results

Podobny opis - ADM8692_15

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Linear Technology
LTC690 LINER-LTC690 Datasheet
141Kb / 16P
   Microprocessor Supervisory Circuits
logo
Maxim Integrated Produc...
MAX690 MAXIM-MAX690 Datasheet
626Kb / 16P
   Microprocessor Supervisory Circuits
Rev 2; 4/95
MAX690A MAXIM-MAX690A Datasheet
98Kb / 12P
   Microprocessor Supervisory Circuits
Rev 3; 9/93
logo
Analog Devices
ADM690A AD-ADM690A Datasheet
327Kb / 8P
   Microprocessor Supervisory Circuits
REV. 0
ADM8690ADM8695 AD-ADM8690ADM8695 Datasheet
183Kb / 16P
   Microprocessor Supervisory Circuits
REV. 0
ADM8698 AD-ADM8698 Datasheet
95Kb / 4P
   Microprocessor Supervisory Circuits
REV. 0
ADM805LM AD-ADM805LM_15 Datasheet
334Kb / 8P
   Microprocessor Supervisory Circuits
REV. 0
ADM692A AD-ADM692A_15 Datasheet
334Kb / 8P
   Microprocessor Supervisory Circuits
REV. 0
ADM693 AD-ADM693_15 Datasheet
291Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
ADM706P AD-ADM706P_15 Datasheet
333Kb / 16P
   Microprocessor Supervisory Circuits
REV. D
logo
Linear Technology
LTC691 LINER-LTC691_15 Datasheet
270Kb / 20P
   Microprocessor Supervisory Circuits
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com