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STM32WB55CC Folha de dados(PDF) 48 Page - STMicroelectronics |
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STM32WB55CC Folha de dados(HTML) 48 Page - STMicroelectronics |
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48 / 193 page  Functional overview STM32WB55xx STM32WB35xx 48/193 DS11929 Rev 11 The main features of the touch sensing controller are the following: Proven and robust surface charge transfer acquisition principle Supports up to 18 capacitive sensing channels Up to six capacitive sensing channels can be acquired in parallel offering a very good response time Spread spectrum feature to improve system robustness in noisy environments Full hardware management of the charge transfer acquisition sequence Programmable charge transfer frequency Programmable sampling capacitor I/O pin Programmable channel I/O pin Programmable max count value to avoid long acquisition when a channel is faulty Dedicated end of acquisition and max count error flags with interrupt capability One sampling capacitor for up to three capacitive sensing channels to reduce the system components Compatible with proximity, touchkey, linear and rotary touch sensor implementation Designed to operate with STMTouch touch sensing firmware library Note: The number of capacitive sensing channels is dependent upon the package (not available on QFPN48) and subject to I/O availability. |
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