Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

ADM693AR Arkusz danych(PDF) 7 Page - Analog Devices

Numer części ADM693AR
Szczegółowy opis  Microprocessor Supervisory Circuits
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

ADM693AR Arkusz danych(HTML) 7 Page - Analog Devices

Back Button ADM693AR Datasheet HTML 3Page - Analog Devices ADM693AR Datasheet HTML 4Page - Analog Devices ADM693AR Datasheet HTML 5Page - Analog Devices ADM693AR Datasheet HTML 6Page - Analog Devices ADM693AR Datasheet HTML 7Page - Analog Devices ADM693AR Datasheet HTML 8Page - Analog Devices ADM693AR Datasheet HTML 9Page - Analog Devices ADM693AR Datasheet HTML 10Page - Analog Devices ADM693AR Datasheet HTML 11Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 16 page
background image
ADM690–ADM695
REV. A
–7–
Table I. ADM691, ADM693, ADM695 Reset Pulse Width and Watchdog Timeout Selections
Watchdog Timeout Period
Reset Active Period
Immediately
OSC SEL
OSC IN
Normal
After Reset
ADM691/ADM693
ADM695
Low
External Clock Input
1024 CLKS
4096 CLKS
512 CLKS
2048 CLKS
Low
External Capacitor
260 ms
× C/47 pF 1.04 s × C/47 pF
130 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
NOTE
With the OSC SEL pin low, OSC IN can be driven by an external clock signal, or an external capacitor 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: F OSC (Hz) = 184,000/C (pF).
The watchdog timeout period is fixed at 1.6 seconds, and the
reset pulse width is fixed at 50 ms on the ADM690/ADM692.
On the ADM694 the watchdog timeout period is also 1.6 sec-
onds but the reset pulse width is fixed at 200 ms. The ADM691/
ADM693/ADM695 allow these times to be adjusted as shown
in Table I. Figure 4 shows the various oscillator configurations
which can be used to adjust the reset pulse width and watchdog
timeout period.
The internal oscillator is enabled when OSC SEL is high or
floating. In this mode, OSC IN selects between the 1.6 second
and 100 ms watchdog timeout periods. With OSC IN connected
high or floating, the 1.6 second timeout period is selected; while
with it connected low, the 100 ms timeout period is selected. In
either case, immediately after a reset, the timeout period is 1.6
seconds. This gives the microprocessor time to reinitialize the
system. If OSC IN is low, then the 100 ms watchdog period be-
comes effective after the first transition of WDI. The software
should be written such that the I/O port driving WDI is left in
its power-up reset state until the initialization routines are com-
pleted and the microprocessor is able to toggle WDI at the mini-
mum watchdog timeout period of 70 ms.
Watchdog Output (WDO)
The Watchdog Output WDO (ADM691/ADM693/ADM695)
provides a status output which goes low if the watchdog timer
“times out” and remains low until set high by the next transition
on the Watchdog Input. WDO is also set high when VCC goes
below the reset threshold.
OSC IN
OSC SEL
ADM691
ADM693
ADM695
CLOCK
0 TO 250kHz
8
7
Figure 4a. External Clock Source
OSC IN
OSC SEL
ADM691
ADM693
ADM695
8
7
C
OSC
Figure 4b. External Capacitor
OSC IN
OSC SEL
ADM691
ADM693
ADM695
8
7
NC
NC
Figure 4c. Internal Oscillator (1.6 Second Watchdog)
OSC IN
OSC SEL
ADM691
ADM693
ADM695
8
7
NC
Figure 4d. Internal Oscillator (100 ms Watchdog)


Podobny numer części - ADM693AR

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
ADM693AR AD-ADM693AR Datasheet
284Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
ADM693AR AD-ADM693AR Datasheet
291Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
ADM693AR AD-ADM693AR Datasheet
291Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
ADM693AR AD-ADM693AR Datasheet
291Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
ADM693AR AD-ADM693AR Datasheet
175Kb / 16P
   Microprocessor Supervisory Circuits
REV. A
More results

Podobny opis - ADM693AR

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


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