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DS4201F 데이터시트(PDF) 20 Page - Dallas Semiconductor |
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DS4201F 데이터시트(HTML) 20 Page - Dallas Semiconductor |
20 / 24 page DS4201 20 of 24 102099 EXTENSION UNIT CONTROL SELECTOR CONTROL SELECTOR VALUE OUTPUT_DOUBLE_CONTROL 0x00 APPENDIX B: PCM DATA FORMATS The DS4201 supports four linear PCM data formats: 16–bit signed stereo, 16–bit signed mono, 8–bit unsigned stereo, and 8–bit unsigned mono. Data for-mats for these four PCM types are shown in Figure 8–11. Coding for PCM 8 and 16 bit formats are shown in Figure 12. As shown in Figure 12, the 16–bit signed format, also know as 2’s complement, uses the value -32768 (0x8000) to represent maximum negative amplitude and 32767 (0x7FFF) to represent maximum positive. The 8–bit unsigned format uses the value 0 (0x00) to represent maximum negative and 255 (0xFF) for maximum positive. SIGNED 16–BIT STEREO DATA FORMAT Figure 8 ? Time . . . SAMPLE 3 SAMPLE 2 SAMPLE 1 . . . RIGHT DATA LEFT DATA RIGHT DATA LEFT DATA RIGHT DATA LEFT DATA . . . 31 16 15 0 31 16 15 0 31 16 15 0 (BIT POSN) SIGNED 16–BIT MONO DATA FORMAT Figure 9 ? Time . . . SAMPLE 3 SAMPLE 2 SAMPLE 1 . . . MONO DATA MONO DATA MONO DATA . . . 15 0 15 0 15 0 (BIT POSN) UNSIGNED 8–BIT STEREO DATA FORMAT Figure 10 ? Time . . . SAMPLE 3 SAMPLE 2 SAMPLE 1 . . . RIGHT DATA LEFT DATA RIGHT DATA LEFT DATA RIGHT DATA LEFT DATA . . . 15 8 7 0 15 8 7 0 15 8 7 0 (BIT POSN) UNSIGNED 8–BIT MONO DATA FORMAT Figure 11 ? Time . . . SAMPLE 3 SAMPLE 2 SAMPLE 1 . . . MONO DATA MONO DATA MONO DATA . . . 7 0 7 0 7 0 (BIT POSN) |
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