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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9965TS 데이터시트(PDF) 14 Page - STMicroelectronics |
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L9965TS 데이터시트(HTML) 14 Page - STMicroelectronics |
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14 / 62 page  In a ring topology, a FLT pin interrupt is generated from both channels of L9965T within NVIF_STACK*TVIF_WAKEUP_TIME timeout. When the MCU is woken up by one channel of L9965T, it is supposed to wait also for the other channel to generate the FLT pin interrupt to confirm the daisy-chain wakeup. If such event does not occur within the NVIF_STACK*TVIF_WAKEUP_TIME timeout, the MCU shall run the VIF chain wakeup by MCU procedure. Figure 6. Wakeup by fault of a daisy chain device 5.1.1.1.2 Wake-up via SPI L9965T/TS can be woken up in DEEPSLEEP, CYCLIC_COUNT and CYCLIC_WAKEUP state by any valid SPI frame issued by MCU on the SPI Target. A wakeup condition is acknowledged when the following pattern is received: 1. A NCS high to low transition 2. 40 SCK pulses 3. A NCS low to high transition The TSPI_WAKEUP_TIMEOUT is started upon every NCS assertion, and the wakeup pattern shall end before timeout expiration, otherwise it is discarded. L9965T/L9965TS Functional description DS14987 - Rev 1 page 14/62 |
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