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SX8661 Datasheet(PDF) 28 Page - Semtech Corporation |
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SX8661 Datasheet(HTML) 28 Page - Semtech Corporation |
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28 / 88 page  ADVANCED COMMUNICATIONS & SENSING DATASHEET Revision v3.2, January 2011 © 2011 Semtech Corp. www.semtech.com 28 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 |
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