SX8663 datasheet(22/64 Pages) SEMTECH

部件名	SX8663

功能描述	Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output

PDF	64 Pages

Scroll/Zoom	100%

制造商	SEMTECH [Semtech Corporation]

网页	http://www.semtech.com

标志

22 / 64 page

ADVANCED COMMUNICATIONS & SENSING

Rev5 4

th August 2011

www.semtech.com

SX8663

Capacitive Button Matrix (up to 36) and Proximity Controller

with Individual LED Drivers and Buzzer Output

3.13.4 Example

A typical example of the assertion and clearing of the INTB and the I2C communication is shown in Figure 18.

Figure 18

Interrupt and I2C

When a button is touched the SX8663 will assert the interrupt (1). The host will read the SX8663 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.

3.14 Reset

The reset can be performed by 3 sources:

- power up,

- RESETB pin,

- software reset.

3.14.1 Power up

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

autonomously. The SX8663 is then ready for operation.

Figure 19

Power Up vs. INTB

SX8663 数据表(PDF) 22 Page - Semtech Corporation