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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ORSPI4 датащи(PDF) 139 Page - Lattice Semiconductor |
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ORSPI4 датащи(HTML) 139 Page - Lattice Semiconductor |
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139 / 263 page  Lattice Semiconductor ORCA ORSPI4 Data Sheet 139 Figure 74. .ORSPI4 Memory Controller Interface to QDRII: 4-Word Burst Mode Figure 75 shows the timing of signals at the QDRII SRAM interface for two-word reads and writes. In this case, address data is sent on both the rising and falling edges of the positive clock signal. Write data is sent on the first rising edge of K before the write address and second data word are provided on the falling edge. As in the four- word case, read data is returned on the second rising edge of K after the read address is provided (on a rising edge of the positive clock). Figure 75. ORSPI4 Memory Controller Interface to QDRII: 2-Word Burst Mode R1 R2 W1 W2 W1a W1b W1c W1d W2a W2b W2c W2d R1a R1b R1c R1d R2a R2b R1 W1 R2 W2 R2c R2d K K# R# W# SA D Q K K# R# W# SA D Q R1 R3 W2 W4 W1a W1b W2a W2b W3a W3b W4a W4b R1a R1b R2a R2b R3a R3b R1 R2 R3 R4 R4a R4b R2 R4 W1 W3 W1 W2 W3 W4 |
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