- 您现在的位置：买卖IC网 > PDF目录98149 > STPCI2HEYI (STMICROELECTRONICS) MULTIFUNCTION PERIPHERAL, PBGA516 PDF资料下载
参数资料
| 型号： | STPCI2HEYI |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 外设及接口 |
| 英文描述： | MULTIFUNCTION PERIPHERAL, PBGA516 |
| 封装： | PLASTIC, BGA-516 |
| 文件页数： | 108/109页 |
| 文件大小： | 2430K |
| 代理商： | STPCI2HEYI |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页当前第108页第109页
STPC ATLAS
98/109
Issue 1.1 - March 23, 2004
6.5.1.3. Board Layout Issues
The physical layout of the motherboard PCB
assumed in this presentation is as shown in Figure
6-29. For the PCI interface, the most critical signal
is the clock. Any skew between the clocks at the
PCI components and the STPC will impact the
timing budget. In order to get well matched clocks
at all components it is recommended that all the
PCI clocks are individually driven from a serial
resistance with matched routing lengths. In other
words, all clock line lengths that go from the
resistor to the PCI chips (PCICLKx) must be
identical.
The figure below is for PCI devices soldered on-
board. In the case of a PCI slot, the wire length
must be shortened by 2.5" to compensate the
clock layout on the PCI board. The maximum
clock skew between all devices is 2ns according
to PCI specifications.
The Figure 6-30 describes a typical clock delay
implementation. The exact timing constraints are
listed in the PCI section of the Electrical
Specifications Chapter.
Figure 6-29. Typical PCI clock routing
Length(PCICLKI) = Length(PCICLKx) with x = {A,B,C}
Note: The value of 22 Ohms corresponds to tracks with Z0 = 70 Ohms.
PCICLKI
PCICLKO
PCICLKA
PCICLKB
PCICLKC
Device A
Device B
Device C
Figure 6-30. Clocks relationships
PCICLKO
PCICLKI
HCLK
PCICLKx
相关PDF资料 |
PDF描述 |
|---|---|
| STPCI2HDYC | MULTIFUNCTION PERIPHERAL, PBGA516 |
| STPIC6C595M | 8-BIT RIGHT SERIAL IN PARALLEL OUT SHIFT REGISTER, TRUE OUTPUT, PDSO16 |
| STR710RZT6 | 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144 |
| STUF32864EHLFT | SSTU SERIES, POSITIVE EDGE TRIGGERED D FLIP-FLOP, TRUE OUTPUT, PBGA96 |
| STV3208CV | 9-BIT, DSP-FAST COSINE TRANSFRM PROCESSOR, PQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STPCINDUSTRIAL | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PC Compatible Embedded Microprocessor |
| STP-CN04 | 功能描述:烙铁 Cartridge Conical 0.4mm (0.016in) RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
| STP-CN05 | 功能描述:烙铁 Cartridge Conical 0.5mm (0.02in) RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
| STP-CN10 | 功能描述:烙铁 Cartridge Conical 1mm (0.039in) RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
| STP-CNB04 | 功能描述:烙铁 Cartridge Conical Bent 0.4mm (0.016in) RoHS:否 制造商:Weller 产品:Soldering Stations 类型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大温度:+ 850 F 电缆类型:US Cord Included |
发布紧急采购，3分钟左右您将得到回复。