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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2549 датащи(PDF) 31 Page - STMicroelectronics |
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AN2549 датащи(HTML) 31 Page - STMicroelectronics |
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31 / 33 page  AN2549 Electrical characteristics 31/33 5.2.2 Hi-speed synchronous serial interface (SSC) The maximum baudrate of the SSC in the ST10F272Z2 is 8 Mbaud whereas it is 10 Mbaud in the ST10F269Zx. For CPU frequencies strictly higher than 32 MHz, the minimum value in the SSCBR register (prescaler value) must not be lower than 2. t28 CC Address/Unlatched CS hold after RD, WR 0 (no tF) -5 + tF (tF > 0) -0 + tF - 0 (no tF) -5 + tF (tF > 0) -0 + tF - t39SR Latched CS low to valid data in - 3 TCL - 19 + 2tA + tC - 3 TCL - 21 + 2tA + tC 18.5 + 2tA + tC - 16.5 + 2tA + tC - t82CC Address setup to RdCS, WrCS (with RW delay) 2 TCL - 10.5 + 2tA - 2 TCL - 11 + 2tA - 14.5 + 2tA - 14 + 2tA - Table 21. Demultiplexed bus timings (continued) Symbol Parameter ST10F269Zx ST10F272Z2 ST10F269Zx @fCPU = 40 MHz ST10F272Z2 @fCPU = 40 MHz Min Max Min Max Min Max Min Max |
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