amintlk
Member level 1
- Joined
- Aug 23, 2010
- Messages
- 36
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,286
- Location
- bojnourd
- Activity points
- 1,523
hi all
i use max485 for rs485 communication ... it works correctly but i have little problem ... i tied RE and DE to one of microcontroller pin to control transmitt and receive mode .. and pin 1 called "RO" is for receive data over the rs485 and it's idle high and it connect to RX pin of microcontroller .. but when i switch to transmitt mode for send data "RO" pin is going to idle low until max485 switch to Receive mode again .. what can i do for hold "RO" in idle high always ???
thanks
i use max485 for rs485 communication ... it works correctly but i have little problem ... i tied RE and DE to one of microcontroller pin to control transmitt and receive mode .. and pin 1 called "RO" is for receive data over the rs485 and it's idle high and it connect to RX pin of microcontroller .. but when i switch to transmitt mode for send data "RO" pin is going to idle low until max485 switch to Receive mode again .. what can i do for hold "RO" in idle high always ???
thanks