CY8C20666AS-24LQXIT datasheet(5/51 Pages) CYPRESS

Part #	CY8C20666AS-24LQXIT

Description	1.8 V Programmable CapSense짰 Controller with SmartSense??Auto-tuning 1??3 Buttons, 0?? Sliders

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Manufacturer	CYPRESS [Cypress Semiconductor]

Direct Link	http://www.cypress.com

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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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CY8C20666AS-24LQXIT Datasheet(PDF) 5 Page - Cypress Semiconductor

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