SX8661Z datasheet(26/87 Pages) SEMTECH

Part #	SX8661Z

Description	Low Power, Capacitive Button Touch and Proximity Controller with LED Drivers and Analog Output

PDF	87 Pages

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v4.0, February 2016

www.semtech.com

SX8661Z

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

3.15.4 Example

A typical example of the assertion and clearing of the INTB and the I2C communication is shown in Figure 22.

off

INTB

time

I2C

read

Figure 22

Interrupt and I2C

When a button is touched the SX8661Z will assert the interrupt (1). The host will read the SX8661Z 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.

3.16 Reset

The reset can be performed by 3 sources:

- power up,

- RESETB pin,

- software reset.

3.16.1 Power up

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

autonomously. The SX8661Z is then ready for operation.

VDD

INTB

time

VDD

t por

supply

voltage

VDDmin

time

SX8661Z ready

Figure 23

Power Up vs. INTB

SX8661Z Datasheet(PDF) 26 Page - Semtech Corporation

SX8661Z Datasheet(HTML) 26 Page - Semtech Corporation

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