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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AL4CE211 датащи(PDF) 2 Page - AverLogic Technologies Inc |
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AL4CE211 датащи(HTML) 2 Page - AverLogic Technologies Inc |
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2 / 2 page  AVERLOGIC TECHNOLOGIES, INC. TEL : 1 408 361-0400 e-mail: sales@averlogic.com URL: www.averlogic.com March 26, 2002 (512, 1k ,2k, 4k, 8k) x9 Memory Array Input Buffer Output Buffer Write Control Logic Read Control Logic Flag Logic Control Logic Write Pointer Read Pointer Offset Regissers Reset Logic Input data bus Output data bus /OE WCLK /WEN /LD /RS RCLK /REN /FF /EF /PAF /PAE /RT Figure 1. AL4CE2x1 FIFO Block Diagram The 9bit input and output ports operate independently at a maximum speed of 133 MHz. The built-in address decoder and pointer managing circuits provide a straightforward bus interface to serially read/write memory that reduces inter-chip design efforts. The AL4CE2x1 embedded memory array and high performance process technologies with extended controller functions (read skip, fixed and programmable status flags.. etc.) offer flexible memory management. These FIFOs support 9bit input and output data bus-width that is controlled by separate clock and enable signals respectively. The input data is acquired at each rising edge of a free running write clock while a write enable control pin is asserted. The output data is available after each rising edge of a free running read clock while a read enable and output enable control pins are asserted. When output enable (/OE) is LOW, the data output bus is active. If /OE is HIGH, the output data bus will be in a high-impedance. This signal can control whether the data is going to be skipped during the read operation. The FIFO Full/Empty and programmable Almost Full/Almost Empty flags are functions that can help controlling software to manipulate the FIFO more easily or to do retransmit operation. And the Retransmit function allows data to be reread from the FIFO more than once. These chips are available as a 32pin TQFP Package DISTRIBUTED BY: |
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