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WM8961GEFL/V Datasheet(PDF) 72 Page - Wolfson Microelectronics plc |
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WM8961GEFL/V Datasheet(HTML) 72 Page - Wolfson Microelectronics plc |
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72 / 116 page  WM8961 Pre-Production w PP, August 2009, Rev 3.1 72 AUTOMATIC MODE V’S MANUAL MODE CLOCK CONFIGURATION The clock configuration for the WM8961 can be set automatically or manually (default). The mode of operation is set by MANUAL_MODE, R30[0]. In manual mode the user must configure all the clock registers (described in the following paragraphs) manually. In automatic mode, SAMPLE_RATE and CLK_SYS_RATE are used to configure the following registers automatically: CLK_256_DIV, CLK_TO_DIV, ADCDIV, DACDIV, CLK_DCS_DIV and DCLKDIV. The BCLKDIV and LRCLK_RATE still require to be set manually in this mode. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R30 (1Eh) Clocking 3 0 MANUAL_MODE 1 Manual clock configuration Enable 0 = When low, use SAMPLE_RATE & CLK_SYS_RATE to allow automatic configuration of system clock dividers. Excludes master mode audio interface clocks. 1 = manual configuration of system clock dividers. 6:1 CLK_256K_DIV[5:0] 10111 256kHz clock divider setting 000000 : SYSCLK/1 000001 : SYSCLK/2 … 101111 : SYSCLK/48 (default) … 111110 : SYSCLK/63 111111 : SYSCLK/64 R27 (1Bh) Additional Control (3) 2:0 SAMPLE_RATE[2:0] 000 Sample Rate Control for ALC and automatic configuration 000 : 44.1k/48k 001 : 32k 010 : 22.05k/24k 011 : 16k 100 : 11.25k/12k 101 : 8k 110-111 : reserved R56 (38h) Clocking 4 4:1 CLK_SYS_RATE[3:0] 0011 Specifies the rate of SYSCLK with respect to the sample rate. 0000 : 64*fs 0001 : 128*fs 0010 : 192*fs 0011 : 256*fs 0100 : 384*fs 0101 : 512*fs 0110 : 768*fs 0111 : 1024 *fs 1000 : 1408*fs 1001: 1536*fs 1010 -> 1111 : reserved Table 52 Clock Configuration: Automatic v’s Manual |
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