Method and apparatus for determining the number of empty memory locations in a FIFO memory device
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United States of America Patent
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Nov 12, 2002
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N/A
app pub date -
Jul 21, 2000
filing date -
Jul 21, 2000
priority date (Note) -
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Abstract
A first-in first-out (FIFO) memory device includes a plurality of memory locations having sequential binary addresses, a write address pointer for sequentially accessing the memory locations to write data therein, and a read address pointer for sequentially accessing the memory locations for reading data therefrom. The method and apparatus add an inverted write binary address of the write address pointer to a read binary address of the read address pointer, add one, and discard the most significant bit (MSB) to define the number of empty memory locations.
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