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參數資料
| 型號： | USS-344 |
| 英文描述： | USS-344 QuadraBus Four-Host PCI-to-USB OpenHCL Host Controller |
| 中文描述： | 號，344 QuadraBus四主機的PCI到USB主機控制器OpenHCL |
| 文件頁數： | 50/54頁 |
| 文件大?。?/td> | 850K |
| 代理商： | USS-344 |
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50
Agere Systems Inc.
Advance Data Sheet, Rev. 9
June 2001
Four-Host PCI-to-USB OpenHCI Host Controller
USS-344
QuadraBus
Electrical Characteristics
(continued)
PCI Timing Parameters
Table 140. Clock and Reset Specifications
1. In general, all PCI components must work with any clock frequency between nominal dc and 33 MHz. Device operational parameters at
frequencies under 16 MHz may be guaranteed by design rather than by testing. The clock frequency may be changed at any time during the
operation of the system, as long as the clock edges remain clean (monotonic), and the minimum cycle and high and low times are not
violated. The clock may only be stopped in a low state. A variance on this specification is allowed for components designed for use on the
system motherboard only. These components may operate at any single fixed frequency up to 33 MHz and may enforce a policy of no
frequency changes.
2. Rise and fall times are specified in terms of the edge rate measured in V/ns. This slew rate must be met across the minimum peak-to-peak
portion of the clock waveform, as shown in Figure 9.
3. The minimum RSTN slew rate applies only to the rising (deassertion) edge of the reset signal and ensures that system noise cannot render
an otherwise monotonic signal to appear to bounce in the switching range.
Symbol
t
CYC
t
HIGH
t
LOW
—
—
Parameter
Min
30
11
11
1
50
Max
∞
—
—
4
—
Unit
ns
ns
ns
V/ns
mV/ns
CLK Cycle Time
1
CLK High Time
CLK Low Time
CLK Slew Rate
2
RSTN Slew Rate
3
相關PDF資料 |
PDF描述 |
|---|---|
| USSP0175 | LOW COST - HIGH PERFORMANC3 VOLTAGE CONTROLLED OSCILLATOR |
| USSP2330 | LOW COST - HIGH PERFORMANCE VOLTAGE CONTROLLED OSCILLATOR |
| USSP2400 | LOW COST - HIGH PERFORMANCE VOLTAGE CONTROLLED OSCILLATOR |
| UT100E | ASIC |
| UT100ER | ASIC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| USS-344QUADRABUS | 制造商:AGERE 制造商全稱:AGERE 功能描述:Four-Host PCI-to-USB OpenHCI Host Controller |
| USS344S-DB | 制造商:AGERE 制造商全稱:AGERE 功能描述:USS-344 QuadraBus Four-Host PCI-to-USB OpenHCL Host Controller |
| USS-4(1m) | 制造商:Ubon 功能描述:1m 1 to 0.4mm D Bulk |
| USS4350 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:50V, 5A NPN LOW VCE(SAT) TRANSISTOR |
| USS4350G-AA3-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:50V, 5A NPN LOW VCE(SAT) TRANSISTOR |
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