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CY7C1461KV33 Scheda tecnica(PDF) 10 Page - Cypress Semiconductor |
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CY7C1461KV33 Scheda tecnica(HTML) 10 Page - Cypress Semiconductor |
10 / 23 page CY7C1461KV33 CY7C1463KV33 Document Number: 001-66681 Rev. *G Page 10 of 23 Truth Table The truth table for CY7C1461KV33/CY7C1463KV33 follows. [1, 2, 3, 4, 5, 6, 7] Operation Address Used CE1 CE2 CE3 ZZ ADV/LD WE BWX OE CEN CLK DQ Deselect Cycle None H X X L L X X X L L->H Tri-State Deselect Cycle None X X H L L X X X L L->H Tri-State Deselect Cycle None X L X L L X X X L L->H Tri-State Continue Deselect Cycle None X X X L H X X X L L->H Tri-State Read Cycle (Begin Burst) External L H L L L H X L L L->H Data Out (Q) Read Cycle (Continue Burst) Next X X X L H X X L L L->H Data Out (Q) NOP/Dummy Read (Begin Burst) External L H L L L H X H L L->H Tri-State Dummy Read (Continue Burst) Next X X X L H X X H L L->H Tri-State Write Cycle (Begin Burst) External L H L L L L L X L L->H Data In (D) Write Cycle (Continue Burst) Next X X X L H X L X L L->H Data In (D) NOP/Write Abort (Begin Burst) None L H L L L L H X L L->H Tri-State Write Abort (Continue Burst) Next X X X L H X H X L L->H Tri-State Ignore Clock Edge (Stall) Current X X X L X X X X H L->H – Sleep Mode None X X X H X X X X X X Tri-State Notes 1. X = “Don't Care.” H = logic HIGH, L = logic LOW. BWx = L signifies at least one byte write select is active, BWx = Valid signifies that the desired byte write selects are asserted, see truth table for details. 2. Write is defined by BWX, and WE. See truth table for read or write. 3. When a write cycle is detected, all IOs are tri-stated, even during byte writes. 4. The DQs and DQPX pins are controlled by the current cycle and the OE signal. OE is asynchronous and is not sampled with the clock. 5. CEN = H, inserts wait states. 6. Device powers up deselected and the IOs in a tri-state 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 = Tri-state when OE is inactive or when the device is deselected, and DQs and DQPX = data when OE is active. |
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