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| 型號(hào)： | SP813MEN |
| 英文描述： | Low Power Microprocessor Supervisory Circuits |
| 中文描述： | 低功耗微處理器監(jiān)控電路 |
| 文件頁(yè)數(shù)： | 10/18頁(yè) |
| 文件大小： | 197K |
| 代理商： | SP813MEN |
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SP705DS/09
SP705 Low Power Microprocessor Supervisory Circuits
Copyright 2000 Sipex Corporation
10
Typically, WDO will be connected to the
non-maskable interrupt input (NMI) of a
μ
P.
When V
CC
drops below the reset threshold,
WDO will go LOW whether or not the watch-
dog timer has timed out. Normally this would
trigger an NMI but RESET goes LOW simulta-
neously, and thus overrides the NMI.
If WDI is left unconnected, WDO can be used as
a low-line output. Since floating WDI disables
the internal timer, WDO goes LOW only when
V
CC
falls below the reset threshold, thus func-
tioning as a low-line output.
Figure 14. SP705/706/813L/813M Watchdog Timing Waveforms
Figure 15. SP705/706 Timing Diagrams with WDI Tri-stated. The SP707/708/813L/813M RESET Output is the Inverse
of the RESET Waveform Shown.
t
RS
RESET*
WDO
0V
+5V
WDI
RESET*
0V
+5V
0V
+5V
0V
+5V
t
WD
t
WD
t
WD
t
WP
* externally triggered LOW by MR,
RESET is for the SP813L/813M only
V
CC
RESET
0V
+5V
0V
+5V
0V
+5V
t
RS
t
RS
t
MR
0V
+5V
MR*
WDO
V
RT
V
*externally driven LOW
t
MD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP813MEP | Low Power Microprocessor Supervisory Circuits |
| SP813MEU | Low Power Microprocessor Supervisory Circuits |
| SP707 | Low Power Microprocessor Supervisory Circuits |
| SP707CN | Low Power Microprocessor Supervisory Circuits |
| SP707CP | Low Power Microprocessor Supervisory Circuits |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP813MEN-L/TR | 制造商:EXAR 制造商全稱:EXAR 功能描述:Low Power Microprocessor Supervisory Circuits |
| SP813MEP | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory Circuits |
| SP813MEP-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP813MEP-L/TR | 制造商:EXAR 制造商全稱:EXAR 功能描述:Low Power Microprocessor Supervisory Circuits |
| SP813MEU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Power Microprocessor Supervisory Circuits |
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