| ??? 07/18/05 09:10 Read: times Msg Score: +1 +1 Informative |
#97544 - Star Point Responding to: ???'s previous message |
Mehdi said:
Do you say i can connect all Gnd's directly or separate all! At the end of the day, all your grounds have to be connected to a common reference point somewhere. It is common practice to keep analogue & digital grounds separate as far as possible, meeting only at a single "star" point very close to the PSU - try searching for "start point grounding" or "star point earthing" etc (both here and with your favourite internet serach engine). Here's some for starters: http://www.8052.com/forum/read.phtml?id=91727 http://www.8052.com/forum/read.phtml?id=80886 (picture missing?) http://www.8052.com/forum/read.phtml?id=33916 Your EVB seems to be expanding the idea with multiple grounds; so you need to look at the data sheet and other supporting documents from the chip manufacturer (EVB manual, reference designs, etc) and see what recommentations they give about grounding. Remember: this stuff will be in the Hardware documents - not the firmware info...! |
