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SX8663 Scheda tecnica(PDF) 22 Page - Semtech Corporation

Il numero della parte SX8663
Spiegazioni elettronici  Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output
PDF  64 Pages
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Produttore elettronici  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8663 Scheda tecnica(HTML) 22 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev5 4
th August 2011
© 2011 Semtech Corp.
www.semtech.com
22
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



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