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LC89057W-VF4A-E Scheda tecnica(PDF) 10 Page - ON Semiconductor |
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LC89057W-VF4A-E Scheda tecnica(HTML) 10 Page - ON Semiconductor |
10 / 59 page LC89057W-VF4A-E No.7202-10/59 9. Initial System Settings 9.1 System Reset (XMODE) • The system operates correctly when XMODE is set to "H" after 3.0V or higher supply voltage is applied. When XMODE is set to "L" after power is turned on, the system is reset. • When setting chip address, demodulation function master or slave, and modulation function or general-purpose I/O function, connect a 10k Ω pull-down or pull-up resistor to EMPHA/UO/CO, ____________ AUDIO/VO, __________ CKST/PB, and ______ INT pins. • If EMPHA/UO/CO, ____________ AUDIO/VO, __________ CKST/PB, and ______ INT are not pulled up or down, their pin state is unstable at the time of input. Consequently proper setting cannot be realized. For these pins, pull-up or pull-down resistor must be connected. Table 9.1: Pin Names and Settings Setting Pins Chip address EMPHA/UO/CO, ________ AUDIO/VO Demodulation function master or slave _______ CKST/PB Modulation function or general-purpose I/O function ____ INT Figure 9.1 Setting Timing Chart of Function Setting Input Pins DVDD XMODE Set pin state 3.3V 3.0V Setting input state Output state Normal system operation range Setting completed Undefined min. 200 μs Setting input state Output state |
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