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| 型號： | SP813MEU |
| 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 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大小： | 197K |
| 代理商： | SP813MEU |
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
RT
*externally driven LOW
t
MD
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PDF描述 |
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| SP707 | Low Power Microprocessor Supervisory Circuits |
| SP707CN | Low Power Microprocessor Supervisory Circuits |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP813MEU-L/TR | 制造商:EXAR 制造商全稱:EXAR 功能描述:Low Power Microprocessor Supervisory Circuits |
| SP8156S-5.0 | 制造商:Alpha & Omega Semiconductor 功能描述: |
| SP820S | 制造商:SECOS 制造商全稱:SeCoS Halbleitertechnologie GmbH 功能描述:8.0AMP Schottky Barrier Rectifiers |
| SP821K | 制造商:Cornell Dubilier Electronics 功能描述: 制造商:Mallory Sonalert Products Inc 功能描述: |
| SP825BB | 制造商:Speco Technologies 功能描述:DWO 8 IN WALL SPEAKER PAIR 2 WAY WITH BACKBOX WHITE |
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