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PC87591L 数据表(PDF) 63 Page - National Semiconductor (TI) |
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PC87591L 数据表(HTML) 63 Page - National Semiconductor (TI) |
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63 / 437 page  3.0 Power, Reset and Clocks (Continued) Revision 1.07 63 www.national.com The following table summarizes the power states described in relation with the PC87591x power planes. Figure 10 shows the power state transitions. Figure 10. Power State Transitions 3.1.3 Power Connection and Layout Guidelines The PC87591x requires a power supply voltage of 3.3V ± 10% for all the digital supplies (V CC and VDD). The analog power supply requires a voltage of 3.3V ± 10% or 3.3V ± 5%. A 3.3V ± 5% analog supply is recommended since it improves the accuracy of measuring input voltage values close to the full-scale (see Section 7.4.1 on page 378). Table 11. PC87591x Power States and Related Power Planes Power State Host Domain (VDD) Suspend (VCC) Analog (AVCC) Battery Backed (VPP) VBAT Battery Fail - - - - - Power Fail - - - + + Power Applied Active and Idle x + + + x Host Power Off - + + + x Host Power On + + + + x Illegal1 1. Operation is not guaranteed. +- - x x x+ - x x x- + x x VBAT Off and VCC Off (VPP Off) Battery Fail Power Fail Host Power Off Host Power On Active Idle VBAT On (VPP On) and VCC Off VCC On and VCC On VCC On and VDD Off VDD Off VDD On Hardware Event VCC On and VDD On VCC On VDD On Power Applied (VCC On) VBAT On (VPP On) and VCC Off Core Domain Host Domain Active with WAIT Software Controlled Hardware Event Software Controlled VDD Off |
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