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U631H64DK35 Datasheet(PDF) 7 Page - Simtek Corporation |
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U631H64DK35 Datasheet(HTML) 7 Page - Simtek Corporation |
7 / 13 page U631H64 7 March 31, 2006 STK Control #ML0045 Rev 1.0 No. STORE Cycle Inhibit and Automatic Power Up RECALL Symbol Min. Max. Unit Alt. IEC 24 Power Up RECALL Durationk, e tRESTORE 650 μs Low Voltage Trigger Level VSWITCH 4.0 4.5 V Nonvolatile Memory Operations STORE Cycle Inhibit and Automatic Up RECALL k: tRESTORE starts from the time VCC rises above VSWITCH. VCC 5.0 V STORE inhibit Power Up VSWITCH tRESTORE RECALL (24) t Software Mode Selection E W A12 - A0 (hex) Mode I/O Power Notes L H 0000 1555 0AAA 1FFF 10F0 0F0F Read SRAM Read SRAM Read SRAM Read SRAM Read SRAM Nonvolatile STORE Output Data Output Data Output Data Output Data Output Data Output High Z Active ICC2 l, m l, m l, m l, m l, m l L H 0000 1555 0AAA 1FFF 10F0 0F0E Read SRAM Read SRAM Read SRAM Read SRAM Read SRAM Nonvolatile RECALL Output Data Output Data Output Data Output Data Output Data Output High Z Active l, m l, m l, m l, m l, m l l: The six consecutive addresses must be in order listed (0000, 1555, 0AAA, 1FFF, 10F0, 0F0F) for a Store cycle or (0000, 1555, 0AAA, 1FFF, 10F0, 0F0E) for a RECALL cycle. W must be high during all six consecutive cycles. See STORE cycle and RECALL cycle tables and diagrams for further details. The following six-address sequence is used for testing purposes and should not be used: 0000, 1555, 0AAA, 1FFF, 10F0, 139C. m: I/O state assumes that G ≤ V IL. Activation of nonvolatile cycles does not depend on the state of G. |
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