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S25FL256SDPNFAQ Arkusz danych(PDF) 93 Page - Cypress Semiconductor |
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S25FL256SDPNFAQ Arkusz danych(HTML) 93 Page - Cypress Semiconductor |
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93 / 149 page ![]() Document Number: 001-98283 Rev. *M Page 92 of 148 S25FL128S/S25FL256S It is important that the IO0-IO3 signals be set to high-impedance at or before the falling edge of the first data out clock. At higher clock speeds the time available to turn off the host outputs before the memory device begins to drive (bus turn around) is diminished. It is allowed and may be helpful in preventing IO0-IO3 signal contention, for the host system to turn off the IO0-IO3 signal outputs (make them high impedance) during the last “don’t care” mode cycle or during any dummy cycles. CS# should not be driven high during mode or dummy bits as this may make the mode bits indeterminate. Figure 9.18 Quad I/O Read Command Sequence (3-byte Address, EBh [ExtAdd=0], LC=00b) Figure 9.19 Continuous Quad I/O Read Command Sequence (3-byte Address), LC=00b Figure 9.20 Quad I/O Read Command Sequence(4-byte Address, ECh or EBh [ExtAdd=1], LC=00b) 0 1 2 3 4 5 6 7 8 12 13 14 15 16 17 18 19 20 21 22 23 Instruction 24 Bit Address Mode Dummy Data 1 Data 2 8 cycles 6 cycles 2 cycles 4 cycles 2 cycles 7 6 5 4 3 2 1 0 20 4 0 4 0 4 0 4 0 21 5 1 5 1 5 1 5 1 22 6 2 6 2 6 2 6 1 23 7 3 7 3 7 3 7 1 CS# SCK IO0 IO1 IO2 IO3 04 5 6 7 8 9 10 11 12 13 14 Data N Data N+1 24 Bit Address Mode Dummy Data 1 Data 2 2 cycles 2 cycles 6 cycles 2 cycles 4 cycles 2 cycles 2 cycles 4 0 4 0 20 4 0 4 0 4 0 4 0 5 1 5 1 21 5 1 5 1 5 1 5 1 6 2 6 2 22 6 2 6 2 6 2 6 1 7 3 7 3 23 7 3 7 3 7 3 7 1 CS# SCK IO0 IO1 IO2 IO3 0 1 2 3 4 5 6 7 8 14 15 16 17 18 19 20 21 22 23 24 25 Instruction 32 Bit Address Mode Dummy Data 1 Data 2 8 cycles 8 cycles 2 cycles 4 cycles 2 cycles 7 6 5 4 3 2 1 0 28 4 0 4 0 4 0 4 0 29 5 1 5 1 5 1 5 1 30 6 2 6 2 6 2 6 1 31 7 3 7 3 7 3 7 1 CS# SCK IO0 IO1 IO2 IO3 |
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