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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SX8661Z датащи(PDF) 28 Page - Semtech Corporation |
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SX8661Z датащи(HTML) 28 Page - Semtech Corporation |
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28 / 87 page  ADVANCED COMMUNICATIONS & SENSING DATASHEET Revision v4.0, February 2016 © 2012 Semtech Corp. www.semtech.com 28 SX8661Z Low Power, Capacitive Button Touch and Proximity Controller (8 sensors) with LED Drivers and Analog Output 3.17 General Purpose Input and Outputs The SX8661Z offers eight General Purpose Input and Outputs (GPIO) pins which can be configured in any of these modes: - GPP (General Purpose PWM) - GPO (General Purpose Output) - SPO (Special Purpose Output) The input state of the GPIO is only used during the initial phase of the power up period. Each of these GPIO modes is described in more details in the following sections. The polarity of the GPP and GPO pins is defined as in figure below, driving an LED as example. It has to be set accordingly in SPM parameter GpioPolarity. gpio gpio vdd (a) (b) Figure 26 polarity = 1 (a), polarity = 0 (b) The PWM blocks used in GPP and GPO modes are 8-bits based and clocked at 2MHz typ. hence offering 256 selectable pulse width values with a granularity of 0.5us typ. time (a) period width time (b) period width Figure 27 PWM definition, (a) small pulse width, (b) large pulse width 3.17.1 GPP mode GPIOs configured as GPP will operate as PWM outputs directly controlled by the host. A typical application is LED dimming. Typical GPP operation is illustrated in figure below. |
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