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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT83SND2CMP3 датащи(PDF) 15 Page - ATMEL Corporation |
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AT83SND2CMP3 датащи(HTML) 15 Page - ATMEL Corporation |
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15 / 97 page  15 AT83SND2CMP3 7524B–MP3–05/06 Frame Information The MP3 frame header contains information on the audio data contained in the frame. These informations is made available in the MP3STA register for you information. MPVER and MPFS1:0 bits allow decoding of the sampling frequency according to Table 17. MPVER bit gives the MPEG version (2 or 1). Table 17. MP3 Frame Frequency Sampling Ancillary Data MP3 frames also contain data bits called ancillary data. These data are made available in the MP3ANC register for each frame. As shown in Figure 12, the ancillary data are available by Bytes when MPANC flag in MP3STA register is set. MPANC flag is set when the ancillary buffer is not empty (at least one ancillary data is available) and is cleared only when there is no more ancillary data in the buffer. This flag can generate an interrupt as explained in Section “Interrupt”. When set, software must read all Bytes to empty the ancillary buffer. Figure 12. Ancillary Data Block Diagram MPVER MPFS1 MPFS0 Fs (kHz) 0 0 0 22.05 (MPEG II) 0 0 1 24 (MPEG II) 0 1 0 16 (MPEG II) 011 Reserved 1 0 0 44.1 (MPEG I) 101 48 (MPEG I) 110 32 (MPEG I) 111 Reserved Ancillary Data To C51 8 MP3ANC 8 MPANC MP3STA.7 7-Byte Ancillary Buffer |
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