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WM8758CBGEFL/V Datasheet(PDF) 70 Page - Wolfson Microelectronics plc |
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WM8758CBGEFL/V Datasheet(HTML) 70 Page - Wolfson Microelectronics plc |
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70 / 90 page  WM8758B Production Data w PD, Rev 4.4, January 2012 70 The PLL performs best when f2 is around 90MHz. Its stability peaks at N=8. Some example settings are shown below. MCLK (MHz) (f1) DESIRED OUTPUT (SYSCLK) (MHz) f2 (MHz) R N K N REGISTER R36[3:0] K REGISTERS R37 R38 R39 12 11.2889025 90.31122 1 2 7.525935 7h 86A3ACh 0111 (XX7h) 000100001 (021h) 101010001 (151h) 110101100 (1ACh) 12 12.288 98.304 1 2 8.192 8h 3126E8h 1000 (XX8h) 000001100 (00Ch) 010010011 (093h) 011101000 (0E8h) 13 11.29 90.3168 1 2 6.947446 6h F28BD4h 0110 (XX6h) 000111100 (03Ch) 101000101 (145h) 111010100 (1D4h) 13 12.288 98.304 1 2 7.561846 7h 8FD525h 0111 (XX7h) 000100011 (023h) 111101010 (1Eah) 100100101 (125h) 14.4 11.29 90.3168 1 2 6.272 6h 45A1Cah 0110 (XX6h) 000010001 (011h) 011010000 (0D0h) 111001010 (1Cah) 14.4 12.288 98.304 1 2 6.826667 6h D3A06Eh 0110 (XX6h) 000110100 (034h) 111010000 (1D0h) 001101110 (06Eh) 19.2 11.29 90.3168 2 2 9.408 9h 6872Afh 1001 (XX9h) 000011010 (01Ah) 000111001 (039h) 010101111 (0Afh) 19.2 12.288 98.304 2 2 10.24 Ah 3D70A3h 1010 (XXAh) 000001111 (00Fh) 010111000 (0B8h) 010100011 (0A3h) 19.68 11.29 90.3168 2 2 9.178537 9h 2DB492h 1001 (XX9h) 000001011 (00Bh) 011011010 (0Dah) 010010010 (092h) 19.68 12.288 98.304 2 2 9.990243 9h FD809Fh 1001 (XX9h) 000111111 (03Fh) 011000000 (0C0h) 010011111 (09Fh) 19.8 11.29 90.3168 2 2 9.122909 9h 1F76F7h 1001 (XX9h) 000000111 (007h) 110111011 (1BBh) 011110111 (0F7h) 19.8 12.288 98.304 2 2 9.929697 9h EE009Eh 1001 (XX9h) 000111011 (03Bh) 100000000 (100h) 010011110 (09Eh) 24 11.2889025 90.31122 2 2 7.525935 7h 86A3ACh 0111 (XX7h) 000100001 (021h) 101010001 (151h) 110101100 (1ACh) 24 12.288 98.304 2 2 8.192 8h 3126E8h 1000 (XX8h) 000001100 (00Ch) 010010011 (093h) 011101000 (0E8h) 26 11.29 90.3168 2 2 6.947446 6h F28BD4h 0110 (XX6h) 000111100 (03Ch) 101000101 (145h) 111010100 (1D4h) 26 12.288 98.304 2 2 7.561846 7h 8FD525h 0111 (XX7h) 000100011 (023h) 111101010 (1Eah) 100100101 (125h) 27 11.29 90.3168 2 2 6.690133 6h B0AC93h 0110 (XX6h) 000101100 (02Ch) 001010110 (056h) 010010011 (093h) 27 12.288 98.304 2 2 7.281778 7h 482296h 0111 (XX7h) 000010010 (012h) 000010001 (011h) 010010110 (096h) Table 49 PLL Frequency Examples GENERAL PURPOSE INPUT/OUTPUT The WM8758B has three dual purpose input/output pins. CSB/GPIO1: CSB / GPIO1 pin L2/GPIO2: Left channel line input / headphone detection input R2/GPIO3: Right channel line input / headphone detection input The GPIO2 and GPIO3 functions are provided for use as jack detection inputs. The GPIO1 and GPIO2 functions are provided for use as jack detection inputs or general purpose outputs. The default configuration for the CSB/GPIO1 is to be an input. When setup as an input, the CSB/GPIO1 pin can either be used as CSB or for jack detection, depending on how the MODE pin is set. Table 50 illustrates the functionality of the GPIO1 pin when used as a general purpose output. |
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