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CDB43L43 датащи(PDF) 7 Page - Cirrus Logic |
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CDB43L43 датащи(HTML) 7 Page - Cirrus Logic |
7 / 36 page CS43L43 DS479PP3 7 3.2.1 Internal Serial Clock Mode The device will enter the Internal Serial Clock Mode if no low to high transitions are detected on the SCLK pin for 2 consecutive periods of LRCK. In this mode, the SCLK is internally derived and syn- chronous with MCLK and LRCK. The SCLK/LRCK ratio is either 32, 48, or 64 depending upon the MCLK/LRCK ratio and the Digital Interface Format selection (see Table 4). The internal serial clock is utilized when de-emphasis control is required. Operation in the Internal Serial Clock mode is identical to operation with an external SCLK synchronized with LRCK; how- ever, External SCLK mode is the recommended system clocking application. 3.2.2 External Serial Clock Mode The device will enter the External Serial Clock Mode whenever 16 low to high transitions are detect- ed on the SCLK pin during any phase of the LRCK period. The device will revert to Internal Serial Clock Mode if no low to high transitions are detected on the SCLK pin for 2 consecutive periods of LRCK. 3.3 Digital Interface Format The device will accept audio samples in 1 of 4 digital interface formats in Stand-Alone mode, as illustrated in Table 5, and 1 of 7 formats in Control Port mode, as illustrated in Table 14. 3.3.1 Stand-Alone Mode The desired format is selected via the DIF0 and DIF1 pins. For an illustration of the required rela- tionship between the LRCK, SCLK and SDATA, see Figures 2-4. Input Digital Interface Format Selection Internal MCLK/LRCK Ratio I2S up to 24 Bits I2S 16 Bits Left Justified 24 Bits Right Justified 24, 20, or 18 Bits Right Justified 16 Bits SCLK/LRCK Ratio 512, 256, 128 XX 32 384, 192 XX X X 48 512, 256, 128 XX X 64 Table 4. Internal SCLK/LRCK Ratio DIF1 DIF0 DESCRIPTION FORMAT FIGURE 00 I2S, up to 24-bit data 02 01 Left Justified, up to 24-bit data 13 10 Right Justified, 24-bit Data 24 11 Right Justified, 16-bit Data 34 Table 5. Digital Interface Format - Stand-Alone Mode |
Аналогичный номер детали - CDB43L43 |
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Аналогичное описание - CDB43L43 |
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