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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SX8663 датащи(PDF) 47 Page - Semtech Corporation |
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SX8663 датащи(HTML) 47 Page - Semtech Corporation |
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47 / 64 page  ADVANCED COMMUNICATIONS & SENSING Rev5 4 th August 2011 © 2011 Semtech Corp. www.semtech.com 47 SX8663 Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output 5.6 Buzzer Parameters Buzzer Parameters Address Name Bits Description 7:6 Defines the phase 1 duration. 0x00: ~ 5ms 0x01: ~ 10ms 0x02: ~ 15ms (default) 0x03: ~ 30ms 5:4 Defines the phase 2 duration. 0x00: ~ 5ms 0x01: ~ 10ms 0x02: ~ 15ms (default) 0x03: ~ 30ms 3 Defines the buzzer idle level (BuzzerLevelIdle). 0x0: min level (0V), (default) 0x1: max level (VDD) 0x37 BuzzerCfg 2:0 Defines the buzzer pwm prescaler value. Default: 0x04 0x38 BuzzerFreqPhase1 7:0 Defines the frequency for the first phase of the buzzer. freq ≈ 4MHz /(2^prescaler * BuzzerFreqPhase1) Default: 0x40 (4KHz) 0x39 BuzzerFreqPhase2 7:0 Defines the frequency for the second phase of the buzzer. freq ≈ 4MHz /(2^prescaler * BuzzerFreqPhase2) Default: 0x20 (8KHz) 0x3A Reserved 7:0 Reserved (0x00) Table 14 Buzzer Parameters The SX8663 has the ability to drive a buzzer (on GPIO7) to provide an audible indication that a button has been touched. The buzzer is driven by a square signal for approximately 30ms (default). During the first phase (15ms) the signal’s frequency is default 4KHz while in the second phase (15ms) the signal’s frequency default is 8KHz. The buzzer is activated only once during any button touch and is not repeated for long touches. The user can choose to enable or disable the buzzer by configuration and define the idle level, frequencies and phase durations. Figure 47 Buzzer behavior |
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