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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCM2704CDB датащи(PDF) 24 Page - Texas Instruments |
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PCM2704CDB датащи(HTML) 24 Page - Texas Instruments |
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24 / 53 page  Ready for Setup Ready for Playback V DD 0 V D+ / D- SSPND V L V R OUT OUT 2.0 V (typ) Bus Idle Bus Reset Set Configuration SOF First Audio Data SOF SOF Second Audio Data 3.3 V (typ) BPZ 1 ms Device Setup 700 s m Internal Reset PCM2704C, PCM2705C, PCM2706C, PCM2707C SBFS036B – MAY 2015 – REVISED AUGUST 2015 www.ti.com 9.3.10 USB Host Interface Sequence 9.3.10.1 Power-On, Attach, and Playback Sequence The PCM2704C/5C/6C/7C are ready for setup when the reset sequence has finished and the USB bus is attached. After a connection has been established (through the setup process), the PCM2704C/5C/6C/7C are ready to accept USB audio data. While waiting for the audio data (that is, the device is in an idle state), the analog output is set to bipolar zero (BPZ). Upon receiving the audio data, the PCM2704C/5C/6C/7C stores the first audio packet in the internal storage buffer. The packet contains 1 ms of audio data. The PCM2704C/5C/6C/7C start playing the audio data after detecting the next subsequent start-of-frame (SOF) packet. Figure 30 shows the initial operation sequence for the device. Figure 30. Initial Sequence 9.3.10.2 Play, Stop, and Detach Sequence When the host finishes or aborts playback, the PCM2704C/5C/6C/7C stop playing after the last audio data output is complete. Figure 31 shows the play, stop, and detach sequence. 24 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: PCM2704C PCM2705C PCM2706C PCM2707C |
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