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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) 178 Page - Lattice Semiconductor |
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ORSPI4 датащи(HTML) 178 Page - Lattice Semiconductor |
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178 / 263 page  Lattice Semiconductor ORCA ORSPI4 Data Sheet 178 SPI4 AC Timing Supported Data Rates The SPI4 interfaces (SPIA and SPIB) on the ORSPI4 device support the following data rates Table 58. Supported Data Rates 1 SPI[A,B]_TREFCLK_x8 internal signal is used in quarter-rate mode SPI4.2 Data Interface System Timing Reference Points Figure 90 shows the system timing reference points A and B for the data path timing parameters for both the trans- mit interface and the receive interface. Figure 90. System Timing Reference Points. Figure 91 defines the timing parameters tdia and tdib which show the relationship of TDCLK to TDAT generated by the ORSPI4 transmit interface. Values of tdia and tdib are given in Table 59. Figure 91. SPI4.2 Transmit Timing Points with Respect to Clock Edge Data Rate Clock Frequency (DDR) Transmit REFCLK Frequency Recommended Operating Mode 500 -900 Mbps 250 - 450 MHz 62.5 - 112.5 MHz Dynamic 500 -650 Mbps 250 - 325 MHz 62.5 - 81.25 MHz Static 100 - 200 Mbps 50 - 100 MHz 100 - 200 MHz 1 Quarter-rate static mode Source Sink TDAT[15:0] / RDAT[15:0} TCTL/RCTL TDCLK/RDCLK AB TDCLK TDAT (A) Launch Edge T dia T dib D TDCLK |
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