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AS8221-ASSP 数据表(PDF) 17 Page - ams AG |
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AS8221-ASSP 数据表(HTML) 17 Page - ams AG |
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17 / 42 page ![]() AS8221 Datasheet - Detailed Descr i p ti on www.austriamicrosystems.com/flexray/AS8221 Revision 1.7 17 - 42 8.7.2 Local Wake-Up Event In all low-power modes, if the voltage on the WAKE pin falls below VLWUTH for longer than tLWFilter, a local wake-up event is detected. At the same time the biasing of the pin is switched to pull-down. If the voltage on the WAKE pin rises above VLWUTH for longer than tLWFilter, a local wake-up event is detected. At the same time the biasing of the pin is switched to pull-up. The pull up and down mechanism is active in low-power and non-low-power modes. Figure 8. WAKE Input Pin Behavior WAKE RxD / RxEN INH tLWFilter tLWFilter PULL UP PULL UP PULL DOWN VBAT VBAT VIO |
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