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L99DZ120 データシート(PDF) 71 Page - STMicroelectronics |
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L99DZ120 データシート(HTML) 71 Page - STMicroelectronics |
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71 / 162 page  DocID029145 Rev 4 71/162 L99DZ120 Application information 161 4.8 Reset output (NReset) Figure 28. NReset pin If V1 is turned on and the voltage exceeds the V1 reset threshold, the reset output NReset is pulled up to V1 by an internal pull-up resistor after a reset delay time (tV1R). This is necessary for a defined start of the micro controller when the application is switched on. Since the NReset output is realized as an open drain output it is also possible to connect an external NReset open drain NReset source to the output. As soon as the NReset is released by the devices the watchdog starts with a long open window. A reset pulse is generated in case of: V1 drops below VRTxfalling (configurable by SPI) for t > tUV1 Watchdog failure Turn-on of the V1 regulator (VSREG Power-on or wake-up from Vbat_standby mode) 4.9 LIN Bus Interface Figure 29. RxDL pin |
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