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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT83SND2CMP3B датащи(PDF) 74 Page - ATMEL Corporation |
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AT83SND2CMP3B датащи(HTML) 74 Page - ATMEL Corporation |
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74 / 241 page  74 4341F–MP3–03/06 AT8xC51SND2C/MP3B 14. Audio Output Interface The AT8xC51SND2C implement an audio output interface allowing the audio bitstream to be output in various formats. It is compatible with right and left justification PCM and I 2S formats and thanks to the on-chip PLL (see Section “Clock Controller”, page 13) allows connection of almost all of the commercial audio DAC families available on the market. The audio bitstream can be from 2 different types: • The MP3 decoded bitstream coming from the MP3 decoder for playing songs. • The audio bitstream coming from the MCU for outputting voice or sounds. 14.1 Description The C51 core interfaces to the audio interface through five special function registers: AUDCON0 and AUDCON1, the Audio Control registers (see Table 14-3 and Table 14-4); AUDSTA, the Audio Status register (see Table 14-5); AUDDAT, the Audio Data register (see Table 14-6); and AUDCLK, the Audio Clock Divider register (see Table 14-7). Figure 14-1 shows the audio interface block diagram, blocks are detailed in the following sections. Figure 14-1. Audio Interface Block Diagram AUD CLOCK UDRN AUDSTA.6 0 1 DSIZ AUDCON0.1 DSEL Clock Generator DCLK DOUT SCLK JUST4:0 AUDCON0.7:3 POL AUDCON0.2 AUDEN AUDCON1.0 HLR AUDCON0.0 0 1 SRC AUDCON1.7 8 Data Converter Audio Data From C51 Audio Data From MP3 DUP1:0 AUDCON1.2:1 16 16 SREQ AUDSTA.7 Audio Buffer AUBUSY AUDSTA.5 Data Ready DRQEN AUDCON1.6 MP3 Buffer Decoder 16 Sample Request To MP3 Decoder AUDDAT To DAC |
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