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CY8C20666A-24LQXIT Datasheet(PDF) 5 Page - Cypress Semiconductor |
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CY8C20666A-24LQXIT Datasheet(HTML) 5 Page - Cypress Semiconductor |
5 / 51 page CY8C20XX6A/S Document Number: 001-54459 Rev. *T Page 5 of 51 Analog Multiplexer System The Analog Mux Bus can connect to every GPIO pin. Pins are connected to the bus individually or in any combination. The bus also connects to the analog system for analysis with the CapSense block comparator. Switch control logic enables selected pins to precharge continuously under hardware control. This enables capacitive measurement for applications such as touch sensing. Other multiplexer applications include: ■ Complex capacitive sensing interfaces, such as sliders and touchpads. ■ Chip-wide mux that allows analog input from any I/O pin. ■ Crosspoint connection between any I/O pin combinations. Additional System Resources System resources provide additional capability, such as configurable USB and I2C slave, SPI master/slave communication interface, three 16-bit programmable timers, and various system resets supported by the M8C. These system resources provide additional capability useful to complete systems. Additional resources include low voltage detection and power on reset. The merits of each system resource are listed here: ■ The I2C slave/SPI master-slave module provides 50/100/400 kHz communication over two wires. SPI communication over three or four wires runs at speeds of 46.9 kHz to 3 MHz (lower for a slower system clock). ■ Low-voltage detection (LVD) interrupts can signal the application of falling voltage levels, while the advanced power-on-reset (POR) circuit eliminates the need for a system supervisor. ■ An internal reference provides an absolute reference for capacitive sensing. ■ A register-controlled bypass mode allows the user to disable the LDO regulator. |
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