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CY62148ELL-45ZSXA Datasheet(PDF) 8 Page - Cypress Semiconductor |
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CY62148ELL-45ZSXA Datasheet(HTML) 8 Page - Cypress Semiconductor |
8 / 17 page CY62148E MoBL® Document Number: 38-05442 Rev. *L Page 8 of 17 Switching Waveforms Figure 4. Read Cycle No. 1 (Address Transition Controlled) [20, 21] Figure 5. Read Cycle No. 2 (OE Controlled) [21, 22] Figure 6. Write Cycle No. 1 (WE Controlled, OE HIGH During Write) [23, 24] PREVIOUS DATA VALID DATA VALID RC tAA tOHA tRC ADDRESS DATA OUT 50% 50% DATA VALID tRC tACE tDOE tLZOE tLZCE tPU HIGH IMPEDANCE tHZOE tHZCE tPD IMPEDANCE ICC ISB HIGH ADDRESS CE DATA OUT VCC SUPPLY CURRENT OE DATA VALID tHD tSD tPWE tSA tHA tAW tSCE tWC tHZOE ADDRESS CE WE DATA I/O OE NOTE 25 Notes 20. Device is continuously selected. OE, CE = VIL. 21. WE is HIGH for read cycles. 22. Address valid before or similar to CE transition LOW. 23. Data I/O is high impedance if OE = VIH. 24. If CE goes HIGH simultaneously with WE HIGH, the output remains in high impedance state. 25. During this period, the I/Os are in output state and input signals must not be applied. |
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