DPRAM design issue

Feb 26, 2004 1 Replies

hi, Folks, I have a dual port RAM with the same width at both side, which is



32bit. However, the data in at A side is only 16 bit wide. So in order to pass the data in and fill the RAM entry, i need to use some wrapper logic (mux?) to pass data in to fill the upper and lower 16 bits in one address of the DRAM in two consequtive clock cycles. Therefore as issue of testablity arises, since the mux logic is not insertable in terms of scan flops. also I have to introduce a clock cycle latency into the A side to fill up the 32 bit entry. Are there any nice tricks to avoid both of the problems? (of course without changing the DPRAM.) Thanks in advance

Ian


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