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发表于 2015-6-8 17:06:52
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dual power supply: IO Power domain and Core Power domain. As the above said, it is the different applicaiton requirement to distinguish them. IO is the interface, to communicate with the components in the PCB board, the higher volatge is required. The core device is scalling down for higher speed and lower the power, the core power supply is lower to match the device physical examines. The voltage level shift is requried in the IO pad to switch signal voltage level between the core and io. |
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