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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L443CC датащи(PDF) 42 Page - STMicroelectronics |
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STM32L443CC датащи(HTML) 42 Page - STMicroelectronics |
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42 / 215 page  Functional overview STM32L443CC STM32L443RC STM32L443VC 42/215 DS11421 Rev 4 3.18 Comparators (COMP) The STM32L443xx devices embed two rail-to-rail comparators with programmable reference voltage (internal or external), hysteresis and speed (low speed for low-power) and with selectable output polarity. The reference voltage can be one of the following: • External I/O • DAC output channels • Internal reference voltage or submultiple (1/4, 1/2, 3/4). All comparators can wake up from Stop mode, generate interrupts and breaks for the timers and can be also combined into a window comparator. 3.19 Operational amplifier (OPAMP) The STM32L443xx embeds one operational amplifier with external or internal follower routing and PGA capability. The operational amplifier features: • Low input bias current • Low offset voltage • Low-power mode • Rail-to-rail input 3.20 Touch sensing controller (TSC) The touch sensing controller provides a simple solution for adding capacitive sensing functionality to any application. Capacitive sensing technology is able to detect finger presence near an electrode which is protected from direct touch by a dielectric (glass, plastic, ...). The capacitive variation introduced by the finger (or any conductive object) is measured using a proven implementation based on a surface charge transfer acquisition principle. The touch sensing controller is fully supported by the STMTouch touch sensing firmware library which is free to use and allows touch sensing functionality to be implemented reliably in the end application. |
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