Hi! I want to Know how to connect and program multiple AT89c51 on a common serial bus so that no one can produce conflict with another client AT89C51, how can i ensure the bus conflict in case of multi master system.What would be the maximum number of clients i can handle on this common bus system.can i find some theory/stuff/material regarding this issure. Regards! Ahmad Kamal.
A bit more info: What would be the maximum number of clients i can handle on this common bus system Using "1/8 unit load" RS485 transcievers, you can have 256 units on the bus. With standard transcievers (75176) you can have 32. An addition to my "Master-slave is (typically?)..." post above: conflict detection buses are (most often?) single ended (noise sensitive). Conflict avoidance buses can be differential (noise resistant). Erik