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CY7C1460SV25 Datasheet(PDF) 9 Page - Cypress Semiconductor |
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CY7C1460SV25 Datasheet(HTML) 9 Page - Cypress Semiconductor |
9 / 31 page CY7C1460SV25 CY7C1462SV25 Document Number: 001-43804 Rev. *J Page 9 of 31 Truth Table Truth table for CY7C1460SV25/CY7C1462SV25 follows. [1, 2, 3, 4, 5, 6, 7] Operation Address Used CE ZZ ADV/LD WE BWx OE CEN CLK DQ Deselect Cycle None H L L X X X L L–H Tristate Continue Deselect Cycle None X L H X X X L L–H Tristate Read Cycle (Begin Burst) External L L L H X L L L–H Data Out (Q) Read Cycle (Continue Burst) Next X L H X X L L L–H Data Out (Q) NOP/Dummy Read (Begin Burst) External L L L H X H L L–H Tristate Dummy Read (Continue Burst) Next X L H X X H L L–H Tristate Write Cycle (Begin Burst) External L L L L L X L L–H Data In (D) Write Cycle (Continue Burst) Next X L H X L X L L–H Data In (D) NOP/WRITE ABORT (Begin Burst) None L L L L H X L L–H Tristate WRITE ABORT (Continue Burst) Next X L H X H X L L–H Tristate IGNORE CLOCK EDGE (Stall) Current X L X X X X H L–H – Sleep MODE None X H X XXXX X Tristate Notes 1. X = “Don't Care”, H = Logic HIGH, L = Logic LOW, CE stands for ALL Chip Enables active. BWx = L signifies at least one Byte Write Select is active, BWx = Valid signifies that the desired byte write selects are asserted, see Write Cycle Description table for details. 2. Write is defined by WE and BWX. See Write Cycle Description table for details. 3. When a write cycle is detected, all IOs are tristated, even during byte writes. 4. The DQ and DQP pins are controlled by the current cycle and the OE signal. 5. CEN = H inserts wait states. 6. Device powers up deselected and the IOs in a tristate condition, regardless of OE. 7. OE is asynchronous and is not sampled with the clock rise. It is masked internally during write cycles.During a read cycle DQs and DQPX = Three-state when OE is inactive or when the device is deselected, and DQs=data when OE is active. |
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