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參數(shù)資料
| 型號(hào)： | MM1099 |
| 廠商： | MITSUMI ELECTRIC |
| 英文描述： | System Reset (Built-in Watch Dog Timer) |
| 中文描述： | 系統(tǒng)復(fù)位（內(nèi)建看門狗定時(shí)器） |
| 文件頁(yè)數(shù)： | 7/7頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | MM1099 |
MITSUMI
System Reset (Built-in Watch Dog Timer) MM1099
Description of Operation
1. The RESET
Approximately 1μA (Vcc=0.8V) of pull up current is output from RESET
2. Charging starts at the capacitor C
T
when V
CC
riset to V
SH
(MM1099A .= 3.25V, MM1099B .= 4.3V), when the
output has been reset.
3. The output reset is released after a given interval T
from when the C
Starts charging and to when it
discharges (that is, the time from when C
T
voltage takes a given value 1 (.= 1.4V) up until decreases to a
given value 2 (.= 0.2V). (RESET
(V
CC
=0.8V). The reset hold time T
PR
is expressed by the following formula:
T
PR
(ms) .= 5000 C
T
(μF)
After the reset release C
T
restarts charging and the watch dog timer begins operating.
Note that input of clock while POWER ON RESET time T
PR
will cause an erroneous operation.
4. If clock is input into CK terminal while C
T
is charging (negative edge trigger), C
T
changes from charging
over to discharging.
5. When the C
T
voltage decreases to a given threshold (.= 0.2V), then discharging changes over to charging.
Steps 4 and 5 will be repeated while normal clock is input from the logic system.
6. When the clock ceases and C
T
voltage reaches the RESET ON threshold (.= 1.4V), the output enters into
reset state (RESET
The C
T
charging time T
WD
up until the reset is output (watch dog monitoring time) is expressed by the
following formula:
T
WD
(ms) .= 5000 C
T
(μF)
7. The reset time at the time of watch dog time T
is the discharging time while the C
T
voltage lowers down
to the reset off threshold (.= 0.2V). The calculation formula:
T
WR
(ms) .= 100 C
T
(μF)
After the reset off threshold is reached, the output reset is released and C
T
commences to charge. If
thenceforth the clock is input normally, steps 4 and 5 will be repeated, and setps 6 and 7 repeated if the
clock ceases.
8. When V
CC
lowers down to V
SL
(MM1099A .= 3.2V, MM1099B .= 4.2V), the reset is output. At the same time
C
T
charged.
9. C
T
discharging starts when V
CC
rises up to V
SH
.
If V
CC
lower instantaneously, charging starts after load discharging of C
T
if the time interval from when V
CC
comes lower than V
SL
up until when it rises to V
SH
or higher is equal or superior to the reference value of
V
CC
input pulse width T
PI
.
10.The output reset is released T
PR
after V
CC
becomes V
SH
or higher, and the watch dog time will start. Then if
V
CC
becomes V
SL
or lower, steps 8 to 10 will be repeated.
11.If power Off occurs, reset is output if V
CC
becomes V
SL
or lower.
12.When V
CC
comes down to 0V, the reset output will hold up until V
CC
becomes 0.8V.
will become "Low" if V
CC
rises to about 0.8V.
will become "High"). The RESET will output a pull up current, about 1μA
becoming "Low").
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MM1099A | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVS06; Number of Contacts:61; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Body Style:Straight |
| MM1099AD | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVS07; Number of Contacts:6; Connector Shell Size:11; Connecting Termination:Crimp; Circular Shell Style:Jam Nut Receptacle; Body Style:Straight |
| MM1099AF | TV 22C 22#22D PIN WALL RECP |
| MM1099AS | System Reset (Built-in Watch Dog Timer) |
| MM1099B | System Reset (Built-in Watch Dog Timer) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MM1099A | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:System Reset (Built-in Watch Dog Timer) |
| MM1099AD | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:System Reset (Built-in Watch Dog Timer) |
| MM1099AF | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:System Reset (Built-in Watch Dog Timer) |
| MM1099AS | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:System Reset (Built-in Watch Dog Timer) |
| MM1099B | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:System Reset (Built-in Watch Dog Timer) |
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