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U632H64 Datasheet(PDF) 9 Page - Simtek Corporation |
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U632H64 Datasheet(HTML) 9 Page - Simtek Corporation |
9 / 15 page U632H64 9 August 15, 2006 STK Control #ML0047 Rev 1.1 u: If the chip enable pulse width is less then ta(E) (see READ cycle) but greater than or equal to tw(E)SR, then the data may not be valid at the end of the low pulse, however the STORE or RECALL will still be initiated. v: W must be HIGH when E is LOW during the address sequence in order to initiate a nonvolatile cycle. G may be either HIGH or LOW throughout. Addresses 1 through 6 are found in the mode selection table. Address 6 determines whether the U632H64 performs a STORE or RECALL. w: E must be used to clock in the address sequence for the Software controlled STORE and RECALL cycles. Ai E DQi Output tcR tw(E)SR High Impedance ADDRESS 1 VALID VALID Software Controlled STORE/RECALL Cyclet, u, v, w (E = HIGH after STORE initiation) ADDRESS 6 (29) (29) th(A)SR (35) (34) tsu(A)SR (33) tcR tw(E)SR High Impedance ADDRESS 1 VALID VALID ADDRESS 6 (29) th(A)SR (35) (34) tsu(A)SR (33) tdis(E)SR (30) th(A)SR (35) tsu(A)SR (33) tw(E)SR th(A)SR (35) (34) tsu(A)SR (33) (5) tdis(E) Software Controlled STORE/RECALL Cyclet, u, v, w (E = LOW after STORE initiation) tdis(E)SR (30) Ai E DQi Output td(E)S (31) (32) td(E)S(31) (32) td(E)R td(E)R tcR |
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