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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM87CIMT датащи(PDF) 19 Page - National Semiconductor (TI) |
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LM87CIMT датащи(HTML) 19 Page - National Semiconductor (TI) |
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19 / 32 page  Functional Description (Continued) 9.0 WATCHDOG LIMIT COMPARISONS AND INTERRUPT STRUCTURE Figure 10 depicts the Interrupt Structure of the LM87. The LM87 can generate Interrupts as a result of each of its internal WATCHDOG registers on the analog, temperature, and fan inputs. External Interrupts can come from the following sources. While the label suggests a specific type or source of Inter- rupt, this label is not a restriction of its usage, and it could come from any desired source: • Chassis Intrusion: This is an active high interrupt from any type of device that detects and captures chassis intrusion violations. This could be accomplished me- chanically, optically, or electrically, and circuitry external to the LM87 is expected to latch the event. The design of the LM87 allows this input to go high even with no power applied to the LM87, and no clamping or other interfer- ence with the line will occur. This line can also be pulled low for at least 20 ms by the LM87 to reset a typical Chassis Intrusion circuit. This reset is activated by setting Bit 7 of CI Clear Register (46h) high. The bit in the Register is self-clearing. 10099531 FIGURE 10. Interrupt Structure www.national.com 19 |
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