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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SM5842AP датащи(PDF) 13 Page - Nippon Precision Circuits Inc |
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SM5842AP датащи(HTML) 13 Page - Nippon Precision Circuits Inc |
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13 / 23 page  SM5842AP/APT NIPPON PRECISION CIRCUITS—13 Soft Muting Muting of the left and right channel is controlled independently by MUTEL and MUTER, respec- tively. Muting is ON when MUTEL/MUTER is HIGH, muting is OFF when MUTEL/MUTER is LOW. When MUTEL/MUTER goes HIGH, the attenuation changes smoothly from 0 to −∞ dB in 512/fs, or approximately 11.6 ms when fs = 44.1 kHz. When MUTEL/MUTER goes LOW, muting is released and the attenuation changes smoothly from −∞ to 0 dB, again taking approximately 11.6 ms. When RSTN goes LOW, the DOL and DOR outputs go LOW, immediately muting the output signal. Muting is released and timing is synchronized when RSTN goes HIGH. System Clock (XTI, XTO, CKO, CKSLN) Two system clock frequencies, 384fs and 256fs, can be used. An external clock source can be input on XTI, or a crystal oscillator can be constructed by connecting a crystal between XTI and XTO. The system clock is also buffered and then output on CKO. The system clock frequency selection and the internal clock frequency are shown in table 2. Table 2. System clock frequency select Parameter CKSLN HIGH LOW XTI input clock frequency (fXI = 1/tXI) 384fs 256fs CKO clock frequency 384fs 256fs Internal clock frequency (tSYS)2 × tXI tXI Figure 2. Clock generator circuit CKSLN XTI XTO CKO 1 / 2 Internal system clock (192fs or 256fs) To timing controller |
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