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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) 65 Page - ATMEL Corporation |
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AT83SND2CMP3B датащи(HTML) 65 Page - ATMEL Corporation |
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65 / 241 page  65 4341F–MP3–03/06 AT8xC51SND2C/MP3B 13.2 Audio Controls 13.2.1 Volume Control The MP3 decoder implements volume control on both right and left channels. The MP3VOR and MP3VOL registers allow a 32-step volume control according to Table 13-2. Table 13-2. Volume Control 13.2.2 Equalization Control Sound can be adjusted using a 3-band equalizer: a bass band under 750 Hz, a medium band from 750 Hz to 3300 Hz and a treble band over 3300 Hz. The MP3BAS, MP3MED, and MP3TRE registers allow a 32-step gain control in each band according to Table 13-3. Table 13-3. Bass, Medium, Treble Control 13.2.3 Special Effect The MPBBST bit in MP3CON register allows enabling of a bass boost effect with the following characteristics: gain increase of +9 dB in the frequency under 375 Hz. 13.3 Decoding Errors The three different errors that can appear during frame processing are detailed in the following sections. All these errors can trigger an interrupt as explained in Section "Interrupt", page 66. 13.3.1 Layer Error The ERRSYN flag in MP3STA is set when a non-supported layer is decoded in the header of the frame that has been sent to the decoder. 13.3.2 Synchronization Error The ERRSYN flag in MP3STA is set when no synchronization pattern is found in the data that have been sent to the decoder. VOL4:0 or VOR4:0 Volume Gain (dB) 00000 Mute 00001 -33 00010 -27 11110 -1.5 11111 0 BAS4:0 or MED4:0 or TRE4:0 Gain (dB) 00000 - ∞ 00001 -14 00010 -10 11110 +1 11111 +1.5 |
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