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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM9713L датащи(PDF) 21 Page - Wolfson Microelectronics plc |
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WM9713L датащи(HTML) 21 Page - Wolfson Microelectronics plc |
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21 / 108 page  Pre-Production WM9713L w PP Rev 3.0 June 2006 21 PCM INTERFACE MODES The WM9713L PCM audio interface may be configured in one of four modes: • Disabled Mode: The WM9713L disables and tri-states all PCM interface pins. Any clock input is ignored and ADC/DAC data is not transferred. • Slave Mode: The WM9713L accepts PCMCLK and PCMFS as inputs from an external source. • Master Mode: The WM9713L generates PCMCLK and PCMFS as outputs. • Partial Master Mode: The WM9713L generates PCMCLK as an output, and accepts PCMFS as an external input. PCM AUDIO DATA FORMATS Four different audio data formats are supported: • DSP mode • Left justified • Right justified • I 2S All four of these modes are MSB first. They are described below. Refer to the Electrical Characteristic section for timing information. The PCM Interface may be configured for Mono mode, where only one channel of ADC data is output. In this mode the interface should be configured for DSP mode. A short or long frame sync is supported and the MSB is available on either the 1st (mode B) or 2nd (mode A) rising edge of VXCLK. Note that when operating in stereo mode the mono Voice DAC always uses the left channel data as its input. PCMFS PCMCLK PCMADC/ PCMDAC n 3 2 1 n-2 n-1 LSB MSB 1 PCMCLK Input Word Length (WL) 1/fs Figure 5 PCM Interface Mono Mode (mode A, FSP=0) |
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