SX8661 datasheet(28/88 Pages) SEMTECH

Teilenummer	SX8661

Bauteilbeschribung	Low Power, Capacitive Button Touch and Proximity Controller

PDF	88 Pages

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Hersteller	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v3.2, January 2011

www.semtech.com

SX8661

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

3.16.4 Example

A typical example of the assertion and clearing of the INTB and the I2C communication is shown in Figure 24.

Figure 24

Interrupt and I2C

When a button is touched the SX8661 will assert the interrupt (1). The host will read the SX8661 status

information over the I2C (2) and this clears the interrupt.

If the finger releases the button the interrupt will be asserted (3), the host reads the status (4) which clears the

interrupt.

In case the host will not react to an interrupt then this will result in a missing touch.

3.17 Reset

The reset can be performed by 3 sources:

- power up,

- RESETB pin,

- software reset.

3.17.1 Power up

During power up the INTB is kept low. Once the power up sequence is terminated the INTB is released

autonomously. The SX8661 is then ready for operation.

Figure 25

Power Up vs. INTB

SX8661 Datenblatt(PDF) 28 Page - Semtech Corporation