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82801E датащи(PDF) 63 Page - Intel Corporation |
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82801E датащи(HTML) 63 Page - Intel Corporation |
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63 / 84 page ![]() Intel® 82801E C-ICH Advance Information Datasheet 63 t22 High time 12 36 ns 9 t23 Low time 12 36 ns 9 t24 Rise time 1.0 5.0 ns 9 t25 Fall time 1.0 5.0 ns 9 Hub Interface Clock fhl Operating Frequency 66 t31 High time 6.0 ns 9 t32 Low time 6.0 ns 9 t33 Rise time 0.25 1.2 ns 9 t34 Fall time 0.25 1.2 ns 9 t35 CLK66 leads PCICLK 1.0 4.5 3 Table 43. Clock Timings - UART_CLK Sym Parameter Min Max Units Notes Fig t1a Operating Frequency 14.7456 48 MHz t9a Frequency Tolerance 2500 PPM t10a High Time 7 ns 9 t11a Low time 7 ns 9 t12a Rise Time 3 ns 9 t155a Fall Time 3 ns 9 Table 44. PCI Interface Timing (Sheet 1 of 2) Sym Parameter Min Max Units Notes Figure t40 AD[31:0] Valid Delay 2 11 ns Min: 0pF Max: 50pF 10 t41 AD[31:0] Setup Time to PCICLK Rising 7 ns 11 t42 AD[31:0] Hold Time from PCICLK Rising 0 ns 11 t43 C/BE[3:0]#, FRAME#, TRDY#, IRDY#, STOP#, PAR, PERR#, PLOCK#, DEVSEL# Valid Delay from PCICLK Rising 211 ns Min: 0pF Max: 50pF 10 t44 C/BE[3:0]#, FRAME#, TRDY#, IRDY#, STOP#, PAR, PERR#, PLOCK#, IDSEL, DEVSEL# Output Enable Delay from PCICLK Rising 2ns 14 Table 42. Clock Timings (Sheet 2 of 2) Sym Parameter Min Max Unit Notes Figure NOTES: 1. The USBCLK is a 48 MHz that expects a 40/60% duty cycle. The source of this PPM is external to this component. 2. The maximum high time (t18 Max) provide a simple guaranteed method for devices to detect bus idle conditions. 3. This specification includes pin-to-pin skew from the clock generator as well as board skew. 4. SUSCLK duty cycle can range from 30% minimum to 70% maximum. |
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