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| Replace 54 pin memory with 66 pin memory? Will this possibly work? |
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| u666sa:
Task -- replace W9825G6JH 4 M x 4banks x 16 BITS SDRAM in 54 tsop2 with HY5DU121622CTP-D43 8M x 4banks x 16bits in 66 tsop2. Legend: 66 pin chip 54 pin chip Possible questionable things: 1.. LDQS, UDQS situation. Not used? 2.. VREF. Should come on after VDDQ. What to do? 3.. LDM, UDM situation. Does connecting to LDQM and UDQM looks legit? 4.. /CK differential. Can it just be connected to CK? Datasheets: 54 pin chip -- W9825G6JH.PDF (803.78 kB - downloaded 21 times.) 66 pin chip -- HYSCS02664-1.pdf (1623.9 kB - downloaded 22 times.) What do you think? :-// |
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