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U635H16DC25G1 Datasheet(PDF) 7 Page - Simtek Corporation |
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U635H16DC25G1 Datasheet(HTML) 7 Page - Simtek Corporation |
7 / 14 page U635H16 7 March 31, 2006 STK Control #ML0050 Rev 1.0 Nonvolatile Memory Operations Mode Selection E W A10 - A0 (hex) Mode I/O Power Notes H X X Not Selected Output High Z Standby L H X Read SRAM Output Data Active m L L X Write SRAM Input Data Active L H 000 555 2AA 7FF 0F0 70F 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 k, l k, l k, l k, l k, l k L H 000 555 2AA 7FF 0F0 70E 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 k, l k, l k, l k, l k, l k k: The six consecutive addresses must be in order listed (000, 555, 2AA, 7FF, 0F0, 70F) for a Store cycle or (000, 555, 2AA, 7FF,0F0, 70E) 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: 000, 555, 2AA, 7FF, 0F0, 39C. l: Activation of nonvolatile cycles does not depend on the state of G. m: I/O state assumes that G ≤ V IL. No. PowerStore Power Up RECALL Symbol Conditions Min. Max. Unit Alt. IEC 24 Power Up RECALL Durationn, e tRESTORE 650 μs 25 STORE Cycle Durationf tPDSTORE the power supply vol- tage must stay above 3.6 V at least 10 ms after the start of the STORE opera- tion 10 ms 26 time allowed to Complete SRAM Cyclef, e tDELAY 1 μs Low Voltage Trigger Level VSWITCH 4.0 4.5 V n: tRESTORE starts from the time VCC rises above VSWITCH. |
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