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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCM1795DB датащи(PDF) 26 Page - Texas Instruments |
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PCM1795DB датащи(HTML) 26 Page - Texas Instruments |
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26 / 58 page  SCL SDA Noise SCL SDA Noise PCM1795 SLES248 – MAY 2009 ........................................................................................................................................................................................................ www.ti.com Case 2: 1. t(SCK) > 120 ns 2. t(S–HD) or t(RS–HD) < t(SCK) × 5 3. Spike noise exists on both SCL and SDA during the hold time. Figure 49. Case 2 When these conditions occur at the same time, the PCM1795 fails to detect a start condition. Case 3: 1. t(SCK) < 50 ns 2. t(SP) > t(SCK) 3. Spike noise exists on SCL just after SCL goes low. 4. Spike noise exists on SDA just before SCL goes low. Figure 50. Case 3 When these conditions occur at the same time, the PCM1795 erroneously detects a start or stop condition. 26 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): PCM1795 |
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