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WM8803CDT/V 데이터시트(PDF) 15 Page - Wolfson Microelectronics plc |
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WM8803CDT/V 데이터시트(HTML) 15 Page - Wolfson Microelectronics plc |
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15 / 45 page ![]() Product Preview WM8803 w PP Rev 1.1 September 2003 15 PLLCK1 PLLCK0 XISEL1 XISEL0 CLKOUT BCLK LRCLK 0 0 0 0 22.5792MHz 5.6448MHz 88.2kHz 0 0 0 1 24.5760MHz 6.1440MHz 96kHz 0 0 1 0 33.8688MHz 8.4672MHz 132.3kHz 0 1 0 0 22.5792MHz 3.7632MHz 58.8kHz 0 1 0 1 24.5760MHz 4.0960MHz 64kHz 0 1 1 0 33.8688MHz 5.6448MHz 88.2kHz 1 0 0 0 22.5792MHz 5.6448MHz 88.2kHz 1 0 0 1 24.5760MHz 6.1440MHz 96kHz 1 0 1 0 33.8688MHz 8.4672MHz 132.3kHz 1 1 0 0 22.5792MHz 5.6448MHz 88.2kHz 1 1 0 1 24.5760MHz 6.1440MHz 96kHz 1 1 1 0 33.8688MHz 8.4672MHz 132.3kHz Table 7 XIN Clock Source Mode Output Clocks Note: 1. XISEL2 = 1, PLL unlocked state or forced setting PLLCK1 PLLCK0 CLKOUT BCLK LRCLK 0 0 256 s 64fs Fs 0 1 384fs 64fs Fs 1 0 512fs 64fs Fs 1 1 256fs 64fs Fs Table 8 PLL Clock Source Mode Output Clocks (PLL Locked State) The CLKOUT output clock frequency can be set to 1/2 its normal value by MCKHFO, regardless of the PLL locked/unlocked state. Clock switching using MCKHFO can also be performed in the PLL locked state without losing that locked state, but clock continuity is not maintained. If the audio output format is set to bi-phase data output, the BCLK output clock frequency will be doubled to 128fs when the PLL circuit is locked. However, when unlocked, the BCLK frequencies from Table 8 will be output. Note that the clock continuity is not maintained when this output format is set. CLOCK SYSTEM DIAGRAM This section presents the relationship between the two master clock types and the switching and clock dividing functions. The items in square brackets near the switch and function blocks are the names of write commands. The Lock/Unlock switch is switched automatically according to the locked/unlocked state of the PLL circuit. |
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