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WCSS0418V1F-100BGI Datasheet(PDF) 6 Page - Weida Semiconductor, Inc. |
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WCSS0418V1F-100BGI Datasheet(HTML) 6 Page - Weida Semiconductor, Inc. |
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6 / 18 page  WCSS0418V1F Document #: 38-05245 Rev. ** Page 6 of 18 Cycle Description Table[1, 2, 3] Cycle Description ADD Used CE1 CE3 CE2 ZZ ADSP ADSC ADV WE OE CLK DQ Deselected Cycle, Power-down None H X X L X L X X X L-H High-Z Deselected Cycle, Power-down None L X L L L X X X X L-H High-Z Deselected Cycle, Power-down None L H X L L X X X X L-H High-Z Deselected Cycle, Power-down None L X L L H L X X X L-H High-Z Deselected Cycle, Power-down None X X X L H L X X X L-H High-Z SNOOZE MODE, Power-Down None X X X H X X X X X X High-Z READ Cycle, Begin Burst External L L H L L X X X L L-H Q READ Cycle, Begin Burst External L L H L L X X X H L-H High-Z WRITE Cycle, Begin Burst External L L H L H L X L X L-H D READ Cycle, Begin Burst External L L H L H L X H L L-H Q READ Cycle, Begin Burst External L L H L H L X H H L-H High-Z READ Cycle, Continue Burst Next X X X L H H L H L L-H Q READ Cycle, Continue Burst Next X X X L H H L H H L-H High-Z READ Cycle, Continue Burst Next H X X L X H L H L L-H Q READ Cycle, Continue Burst Next H X X L X H L H H L-H High-Z WRITE Cycle, Continue Burst Next X X X L H H L L X L-H D WRITE Cycle, Continue Burst Next H X X L X H L L X L-H D READ Cycle, Suspend Burst Current X X X L H H H H L L-H Q READ Cycle, Suspend Burst Current X X X L H H H H H L-H High-Z READ Cycle, Suspend Burst Current H X X L X H H H L L-H Q READ Cycle, Suspend Burst Current H X X L X H H H H L-H High-Z WRITE Cycle, Suspend Burst Current X X X L H H H L X L-H D WRITE Cycle, Suspend Burst Current H X X L X H H L X L-H D ZZ Mode Electrical Characteristics Parameter Description Test Conditions Min Max Unit IDDZZ Snooze mode standby current ZZ > VDD − 0.2V 10 mA tZZS Device operation to ZZ ZZ > VDD − 0.2V 2tCYC ns tZZREC ZZ recovery time ZZ < 0.2V 2tCYC ns Notes: 1. X = “Don't Care,” 1 = Logic HIGH, 0 = Logic LOW. 2. The SRAM always initiates a read cycle when ADSP asserted, regardless of the state of GW, BWE, or BWS[1:0]. Writes may occur only on subsequent clocks after the ADSP or with the assertion of ADSC. As a result, OE must be driven HIGH prior to the start of the write cycle to allow the outputs to three-state. OE is a “Don't Care” for the remainder of the write cycle. 3. OE is asynchronous and is not sampled with the clock rise. During a read cycle DQ = High-Z when OE is inactive, and DQ=data when OE is active. |
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