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ADAU1761BCPZ-R7 数据表(PDF) 29 Page - Analog Devices |
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ADAU1761BCPZ-R7 数据表(HTML) 29 Page - Analog Devices |
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29 / 93 page  ADAU1761 Rev. C | Page 28 of 92 Bits Bit Name Description [10:9] X[1:0] PLL input clock divider 00: X = 1 (default) 01: X = 2 10: X = 3 11: X = 4 8 Type PLL operation mode 0: Integer (default) 1: Fractional 1 Lock PLL lock (read-only bit) 0: PLL unlocked (default) 1: PLL locked 0 PLLEN PLL enable 0: PLL disabled (default) 1: PLL enabled Table 16. Fractional PLL Parameter Settings for fS = 44.1 kHz (PLL Output = 45.1584 MHz = 1024 × fS) MCLK Input (MHz) Input Divider (X) Integer (R) Denominator (M) Numerator (N) R2: PLL Control Setting (Hex) 8 1 5 625 403 0x0271 0193 2901 12 1 3 625 477 0x0271 01DD 1901 13 1 3 8125 3849 0x1FBD 0F09 1901 14.4 2 6 125 34 0x007D 0022 3301 19.2 2 4 125 88 0x007D 0058 2301 19.68 2 4 1025 604 0x0401 025C 2301 19.8 2 4 1375 772 0x055F 0304 2301 24 2 3 625 477 0x0271 01DD 1B01 26 2 3 8125 3849 0x1FBD 0F09 1B01 27 2 3 1875 647 0x0753 0287 1B01 Table 17. Fractional PLL Parameter Settings for fS = 48 kHz (PLL Output = 49.152 MHz = 1024 × fS) MCLK Input (MHz) Input Divider (X) Integer (R) Denominator (M) Numerator (N) R2: PLL Control Setting (Hex) 8 1 6 125 18 0x007D 0012 3101 12 1 4 125 12 0x007D 000C 2101 13 1 3 1625 1269 0x0659 04F5 1901 14.4 2 6 75 62 0x004B 003E 3301 19.2 2 5 25 3 0x0019 0003 2B01 19.68 2 4 205 204 0x00CD 00CC 2301 19.8 2 4 825 796 0x0339 031C 2301 24 2 4 125 12 0x007D 000C 2301 26 2 3 1625 1269 0x0659 04F5 1B01 27 2 3 1125 721 0x0465 02D1 1B01 Table 18. Integer PLL Parameter Settings for fS = 48 kHz (PLL Output = 49.152 MHz = 1024 × fS) MCLK Input (MHz) Input Divider (X) Integer (R) Denominator (M) Numerator (N) R2: PLL Control Setting (Hex)1 12.288 1 4 Don’t care Don’t care 0xXXXX XXXX 2001 24.576 1 2 Don’t care Don’t care 0xXXXX XXXX 1001 1 X = don’t care. |
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