參數(shù)資料
型號: 21041
廠商: Intel Corp.
英文描述: Digital Semiconductor 21041 PCI Ethernet LAN Controller(數(shù)字半導(dǎo)體21041 PCI以太網(wǎng)LAN控制器)
中文描述: 數(shù)字半導(dǎo)體21041 PCI以太網(wǎng)局域網(wǎng)控制器(數(shù)字半導(dǎo)體21041的PCI以太網(wǎng)局域網(wǎng)控制器)
文件頁數(shù): 36/64頁
文件大?。?/td> 230K
代理商: 21041
3.4.3 PCI Clock Specifications
The standard clock frequency range for the PCI is between 16 megahertz
and 33 megahertz. Figure 4 shows the PCI clock timing characteristics
and required measurement points for both 5.0-volt and 3.3-volt signaling
environments. Table 15 lists the frequency-derived clock specifications.
Figure 4 PCI Clock Timing Diagram
Thigh
Tlow
2.0 V
5.0-V Clock
3.3-V Clock
0.8 V
Tr
Tf
LJ03910A.AI5
Tcycle
0.475 *
vdd_clamp
0.325 *
vdd_clamp
Table 15 PCI Clock Timing Specifications
Symbol
Parameter
Minimum
Maximum
Tcycle
Thigh
Tlow
Tr/Tf
Cycle time
pci_clk
high time
pci_clk
low time
pci_clk
slew rate
1
30 ns
11 ns
11 ns
1 V/ns
62.5 ns
4 V/ns
1
Rise and fall times are specified in terms of the edge rate measured in V/ns. Parameter design guarantee.
28
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