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CY62168DV30LL-55BVI Datasheet(PDF) 8 Page - Cypress Semiconductor |
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CY62168DV30LL-55BVI Datasheet(HTML) 8 Page - Cypress Semiconductor |
8 / 13 page CY62168DV30 MoBL® Document Number : 38-05329 Rev. *I Page 8 of 13 Switching Waveforms Figure 1. Read Cycle No. 1 (Address Transition Controlled)[16, 17] Figure 2. Read Cycle No. 2 (OE Controlled)[17, 18] Figure 3. Write Cycle No. 1 (WE Controlled)[19, 20, 21] Notes 16. Device is continuously selected. OE, CE1 = VIL, CE2 = VIH. 17. WE is HIGH for read cycle. 18. Address valid prior to or coincident with CE1 transition LOW and CE2 transition HIGH. 19. The internal write time of the memory is defined by the overlap of WE, CE1 = VIL, and CE2 = VIH. All signals must be ACTIVE to initiate a write and any of these signals can terminate a write by going INACTIVE. The data input set-up and hold timing should be referenced to the edge of the signal that terminates the write. 20. Data I/O is high impedance if OE = VIH. 21. If CE1 goes HIGH or CE2 goes LOW simultaneously with WE HIGH, the output remains in high-impedance state. 22. During this period, the I/Os are in output state and input signals should not be applied. PREVIOUS DATA VALID DATA VALID tRC tAA tOHA ADDRESS DATA OUT 50% 50% DATA VALID tRC tACE tDOE tLZOE tLZCE tPU HIGH IMPEDANCE tHZOE tHZCE tPD HIGH ICC ISB IMPEDANCE OE CE1 ADDRESS DATA OUT SUPPLY CURRENT VCC CE2 tHD tSD tPWE tSA tHA tAW tSCE t VALID DATA See Note 22 tWC HZOE CE1 ADDRESS CE2 WE DATA I/O OE [+] Feedback |
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