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STM32L4P5CE Datasheet(PDF) 52 Page - STMicroelectronics |
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STM32L4P5CE Datasheet(HTML) 52 Page - STMicroelectronics |
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52 / 311 page  Functional overview STM32L4P5xx 52/311 DS12903 Rev 2 3.28 LCD-TFT controller (LTDC) The LCD-TFT display controller provides a 24-bit parallel digital RGB (red, green, blue) and delivers all signals to interface directly to a broad range of LCD and TFT panels with the following features: • One display layer with dedicated FIFO (64 x 32-bit) • Color look-up table (CLUT) up to 256 colors (256 x 24-bit) per layer • Up to 8 input color formats selectable per layer • Flexible blending between two layers using alpha value (per pixel or constant) • Flexible programmable parameters for each layer • Color keying (transparency color) • Up to four programmable interrupt events 3.29 Touch sensing controller (TSC) The touch sensing controller provides a simple solution to add capacitive sensing functionality to any application. A capacitive sensing technology is able to detect finger presence near an electrode that is protected from direct touch by a dielectric (glass, plastic or other). 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. The main features of the touch sensing controller are the following: • Proven and robust surface charge transfer acquisition principle • Supports up to 24 capacitive sensing channels • Up to 3 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 3 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 on the size of the packages and subject to I/O availability. |
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