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GS8162ZV72CC-200 Datasheet(PDF) 10 Page - GSI Technology |
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GS8162ZV72CC-200 Datasheet(HTML) 10 Page - GSI Technology |
10 / 27 page Note: The burst counter wraps to initial state on the 5th clock. Note: The burst counter wraps to initial state on the 5th clock. Linear Burst Sequence A[1:0] A[1:0] A[1:0] A[1:0] 1st address 00 01 10 11 2nd address 01 10 11 00 3rd address 10 11 00 01 4th address 11 00 01 10 Interleaved Burst Sequence A[1:0] A[1:0] A[1:0] A[1:0] 1st address 00 01 10 11 2nd address 01 00 11 10 3rd address 10 11 00 01 4th address 11 10 01 00 GS8162ZV72CC-333/300/250/200/150 Preliminary Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com. Rev: 1.01a 2/2006 10/27 © 2004, GSI Technology Burst Counter Sequences BPR 1999.05.18 Sleep Mode During normal operation, ZZ must be pulled low, either by the user or by its internal pull down resistor. When ZZ is pulled high, the SRAM will enter a Power Sleep mode after 2 cycles. At this time, internal state of the SRAM is preserved. When ZZ returns to low, the SRAM operates normally after ZZ recovery time. Sleep mode is a low current, power-down mode in which the device is deselected and current is reduced to ISB2. The duration of Sleep mode is dictated by the length of time the ZZ is in a High state. After entering Sleep mode, all inputs except ZZ become disabled and all outputs go to High-Z The ZZ pin is an asynchronous, active high input that causes the device to enter Sleep mode. When the ZZ pin is driven high, ISB2 is guaranteed after the time tZZI is met. Because ZZ is an asynchronous input, pending operations or operations in progress may not be properly completed if ZZ is asserted. Therefore, Sleep mode must not be initiated until valid pending operations are completed. Similarly, when exiting Sleep mode during tZZR, only a Deselect or Read commands may be applied while the SRAM is recovering from Sleep mode. Sleep Mode Timing Diagram tZZR tZZH tZZS tKL tKL tKH tKH tKC tKC CK ZZ Designing for Compatibility The GSI NBT SRAMs offer users a configurable selection between Flow Through mode and Pipeline mode via the FT signal found on Bump 5R. Not all vendors offer this option, however most mark Bump 5R as VDD or VDDQ on pipelined parts and VSS on flow through parts. GSI NBT SRAMs are fully compatible with these sockets. |
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