MEMORY DATABOOK - Al Kossow's Bitsavers

• STATIC RAM ·MSM2128RS •• ------------------WRITE CYCLE (4)(5)2128·12RS 2128·15RS 2128·20RSParameter Symbol Unit ConditionsMin. Max. Min. Max. Min. Max.Write Cycle Time twc 120 150 200 nsChip Selection to Endof Writetcw 90 120 150 nsAddress Setup Time tAS 20 20 20 nsWrite Pulse Width twp SO 80 100 nsWrite Recovery Time tWR(S) 10 10 10 n.Data Valid to End of Write tOS(S) 50 70 90 nsData Hold Time tOH(S) 10 15 15 nsWrite Enabled to Outputin High ZtOTWI7l 0 40 0 50 0 SO nsOutput Active fromEnd of Whitetwx 5 5 5 nsNotes1. A read occurs during the overlap of a low CS, a low OE and a high WE.2. tcx is specified from CS or CE, whichever occurs last.3. tOTO is specified from CS or CE, wh ichever occurs first.4. A write occurs during the overlap of a low CS and a low WE.5. OE may be allowed in a Write Cycle both high and low.S. tWR, tos, and tOH are specified from CS or WE, whichever occurs first.7. tOTW is specified by the time when DATA OUT is floating, not defined by output level.WRITE CYCLE NO. 1 (11 )113)twcA."'A,.~WE"I/O(OOUT)twptosI/O(DIN)276