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WM8580 датащи(PDF) 76 Page - Wolfson Microelectronics plc |
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WM8580 датащи(HTML) 76 Page - Wolfson Microelectronics plc |
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76 / 103 page ![]() WM8580 Production Data w PD Rev 4.5 February 2008 76 Figure 41 Typical Power up Sequence where DVDD is Powered before AVDD Figure 42 Typical Power up Sequence where AVDD is Powered before DVDD SYMBOL MIN TYP MAX UNIT Vpora 0.5 0.7 1.0 V Vporr 0.5 0.7 1.1 V Vpora_off 1.0 1.4 2.0 V Vpord_off 0.6 0.8 1.0 V Table 74 Typical POR Operation In a real application, the designer is unlikely to have control of the relative power up sequence of AVDD and DVDD. Using the POR circuit to monitor VMID ensures a reasonable delay between applying power to the device and Device Ready. |
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