Providing up to 256MB of DRAM, the MM-6290D memory module also operates with a 64-bit word per VMEbus specification Rev. D.

The MM-6290D supports A32/A24, D64/D32/D16/D8. Besides the D64 block mode read and write accesses, the MM-6290D responds to A32 and A24 address modifiers for long word, word and byte transfers. Address modifier codes are programmed into a socketed IFL, which allows A32 or A24 masters to access memory when residing on the same bus. The memory module also supports long word, word, unaligned and byte read, write and read-modify-write accesses. Module selection is on 1MB boundaries, with switch-selectable upper and lower limits.

Each 8-bit byte has an associated bit for parity error detection. Parity status is stored and transmitted via BERR*; asserting BERR* inhibits the DTACK* signal during memory read operations.

Ensuring module reliability, complete inspection and testing is performed while running memory diagnostics. In addition, all units undergo 48 hours of burn-in while running diagnostics. Furthermore, Micro Memory backs up board reliability with a 1 Year Warranty.