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WM8580 데이터시트(PDF) 71 Page - Wolfson Microelectronics plc |
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WM8580 데이터시트(HTML) 71 Page - Wolfson Microelectronics plc |
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71 / 97 page ![]() Production Data WM8580 w PD Rev 4.3 August 2007 71 Figure 35 Typical Power up Sequence where DVDD is Powered before AVDD Figure 36 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 68 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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