UPD23C64040JL rom equivalent, (upd23c64040jl / upd23c64080jl) 64m-bit mask-programmable rom.
* Word organization 8,388,608 words by 8 bits (BYTE mode) 4,194,304 words by 16 bits (WORD mode)
* Page access mode BYTE mode : 8 byte random page access (µPD23C6.
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