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U632H16S2K25G1 Datasheet(PDF) 8 Page - Simtek Corporation |
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U632H16S2K25G1 Datasheet(HTML) 8 Page - Simtek Corporation |
8 / 15 page U632H16 8 August 15, 2006 STK Control #ML0046 Rev 1.1 p: tPDSTORE approximate td(E)S or td(H)S; tDELAY approximate tdis(H)S. q: After tw(H)S HSB is hold down internal by STORE operation. r: An automatic RECALL also takes place at power up, starting when VCC exceeds VSWITCH and takes tRESTORE. VCC must not drop below VSWITCH once it has been exceeded for the RECALL to function properly. s: Once the software controlled STORE or RECALL cycle is initiated, it completes automatically, ignoring all inputs. t: Noise on the E pin may trigger multiple READ cycles from the same address and abort the address sequence. No. Software Controlled STORE/ RECALL Cycle Symbol Unit Alt. IEC Min. Max. 29 STORE/RECALL Initiation Time tAVAV tcR 25 ns 30 Chip Enable to Output Inactives tELQZ tdis(E)SR 600 ns 31 STORE Cycle Time tELQXS td(E)S 10 ms 32 RECALL Cycle Timer tELQXR td(E)R 20 μs 33 Address Setup to Chip Enable tAVELN tsu(A)SR 0ns 34 Chip Enable Pulse Widths, t tELEHN tw(E)SR 20 ns 35 Chip Disable to Address Change tEHAXN th(A)SR 0ns PowerStore and automatic Power Up RECALL Hardware Controlled Store DQi Output Previous Data Valid HSB ten(H)S td(H)S Data Valid tdis(H)S tw(H)Sq (28) (26) (27) (25) High Impedance VCAP 5.0 V t PowerStore Power Up VSWITCH W DQi POWER UP RECALL BROWN OUT tRESTORE tRESTORE BROWN OUT PowerStore (NO SRAM WRITES) RECALL (24) (24) NO STORE tPDSTOREp tDELAYp |
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