| 摘要 |
A configuration memory structure includes one or more distributed buffers cascaded together, the output of a first buffer driving an output data line and complementary output data line which terminate at the input of a succeeding buffer. The first buffer includes precharging elements connected between a source and the data line and complementary data line, respectively; data sensing and holding elements connected between respective input and complementary input data lines and the data line and complementary data line, respectively; and tristate elements connected to the outputs of the data sensing and holding elements. This scheme provides fast and reliable configuration and configuration read back, especially for a high density FPGA.
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