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介绍XC9500 CPLD器件的电源序列
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2009-05-13
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Mixed signal systems - typically 5V/3.3V today - require
logic parts that can operate with two power supplies. Xilinx
XC9500 CPLDs are designed to operate in either mixed
5V/3.3V systems or 5V only systems. To handle both conditions,
care has been taken to assure that designers need
not introduce elaborate circuitry to guarantee that 5V and
3.3V power supplies rise or fall in any particular sequence.
This application note describes the underlying XC9500 circuitry
to give designers the understanding they need to
best use these powerful CPLDs.
logic parts that can operate with two power supplies. Xilinx
XC9500 CPLDs are designed to operate in either mixed
5V/3.3V systems or 5V only systems. To handle both conditions,
care has been taken to assure that designers need
not introduce elaborate circuitry to guarantee that 5V and
3.3V power supplies rise or fall in any particular sequence.
This application note describes the underlying XC9500 circuitry
to give designers the understanding they need to
best use these powerful CPLDs.
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