MEMORY DATABOOK - Al Kossow's Bitsavers

• DYNAMIC RAM· MSM411 001 RS .1-----------------NIBBLE MODE1) The case of first nibble cycle is Early write~~ __________________________ ~r__''-_...JI'~ ___ -JIDOUT :)>-_____________ HiQh-Z ______________ _~ Early Write~NO Ope. ..I.(Add Increment)write--...... -tl ... --Write~~: Valid Data2) The case of first nibble cycle is delyed write (Read-Write)RAS ~ ,--\~._______________________-...J'\'--___ -J1\\....__.....J1DOUT---~---------~~--~ Read-Write .. I. Read-Write-----t..-- Read-------+,- Read-Write ....... l~: Valid DetaFUNCTIONAL TRUTH TABLERAS CAS WE DIN DOUT Read Write Refresh NoteH H Don't Care Don't Care High-Z No No No StandbyL L H Don't Care Valid Data Yes No Yes ReadL L L Valid Data High-Z No Yes YesL L L Valid Data Valid Data Yes Yes YesEarly Writetwcs ~ twcs (min)Delayed Write or Read-Wr·itetCWD ~ tCWD (min)L H Don't Care Don't Care High-Z No No Yes RAS Only RefreshCAS-before-RAS Refresh ValidL L Don't Care Don't Care Valid Data No No Yes data selected at previous Reador Read-Write cycle is held.H L Don't Care Don't Care High-Z No No No CAS disturb.216