 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
STPC12 Datasheet(PDF) 92 Page - STMicroelectronics |
|
||||||||||||||||||||||||||||||
STPC12 Datasheet(HTML) 92 Page - STMicroelectronics |
|
|
92 / 111 page  DESIGN GUIDELINES 92/111 Issue 1.0 - July 24, 2002 6.4. PLACE AND ROUTE RECOMMENDATIONS 6.4.1. GENERAL RECOMMENDATIONS Some STPC Interfaces run at high speed and need to be carefully routed or even shielded like: 1) Memory Interface 2) PCI bus 3) Graphics and video interfaces 4) 14 MHz oscillator stage All clock signals have to be routed first and shielded for speeds of 27MHz or higher. The high speed signals follow the same constraints, as for the memory and PCI control signals. The next interfaces to be routed are Memory, PCI, and Video/graphics. All the analog noise-sensitive signals have to be routed in a separate area and hence can be routed indepedently. 6.4.2. PLL DEFINITION AND IMPLIMENTATION PLLs are analog cells which supply the internal STPC Clocks. To get the cleanest clock, the jitter on the power supply must be reduced as much as possible. This will result in a more stable system. Each of the integrated PLL has a dedicated power pin so a single power plane for all of these PLLs, or one wire for each, or any solution in between which help the layout of the board can be used. Powering these pins with one Ferrite + capacitances is enough. We recommend at least 2 capacitances: one 'big' (few uF) for power storage, and one or 2 smalls (100nF + 1nF) for noise filtering. Figure 6-20. Shielding signals ground ring ground pad shielded signal line ground pad shielded signal lines |
Similar Part No. - STPC12 |
|
Similar Description - STPC12 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
