Digi NS9750 Instrukcja Użytkownika Pobierz pdf (Strona 65)

PCI timing

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PCI timing

PCI AC characteristics are measured with 10pF, unless otherwise noted.

Table 30 and Table 31 describe the values shown in the PCI timing diagrams.

Notes:

1 Parameters same for bussed and point-to-point signals.

2 C

LOAD

= 10pf on all outputs

3 pci_clk_out high and low times specified as 50% of the clock period ±1 ns.

Parameter Description Min Max Units Notes

P1 pci_clk_in to signal valid delay 2 9 ns 1, 2

P2 input setup to pci_clk_in 5 ns 1

P3 input hold from pci_clk_in 0 ns

P4 pci_clk_in to signal active 2 ns 2

P5 pci_clk_in to signal float 28 ns 2

P6 pci_clk_out high time 50%-1 50%+1 ns 3

P7 pci_clk_out low time 50%-1 50%+1 ns 3

P8 pci_clk_in cycle time 30 ns

P9 pci_clk_in high time 11 ns

P10 pci_clk_in low time 11 ns

Table 30: PCI timing characteristics

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 87 88

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Digi NS9750 Instrukcja Użytkownika Strona 65