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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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APEX20KC датащи(PDF) 30 Page - Altera Corporation |
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APEX20KC датащи(HTML) 30 Page - Altera Corporation |
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30 / 90 page  30 Altera Corporation APEX 20KC Programmable Logic Device Data Sheet Figure 18. Deep Memory Block Implemented with Multiple ESBs The ESB implements two forms of dual-port memory: read/write clock mode and input/output clock mode. The ESB can also be used for bidirectional, dual-port memory applications in which two ports read or write simultaneously. To implement this type of dual-port memory, two ESBs are used to support two simultaneous reads or writes. The ESB can also use Altera megafunctions to implement dual-port RAM applications where both ports can read or write, as shown in Figure 19. Figure 19. APEX 20KC ESB Implementing Dual-Port RAM ESB ESB ESB to System Logic Address Decoder Port A Port B address_a[] address_b[] data_a[] data_b[] we_a we_b clkena_a clkena_b Clock A Clock B |
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