kkdelabaca
Full Member level 2
max485 pull up
Hello, I'm very confused. I'm designing one board with the protocol RS485 and I need polarize the lines of the MAX485.
**broken link removed**
Obviously, the value of the terminal resistence is 120ohm, but what is the value of the pull-up and the pull-down resistors to polarize the line?
The pull-up resistor is connected to the pin 6 or 7 ? The description of the pin 6 is "Noninverting Receiver Input and Noninverting Driver Output" and the description of the pin 7 is "Inverting Receiver Input and Inverting Driver Output".
Looking for in google I have found a lot of different circuits and a lot of different polarizations.
Thanks!!
Hello, I'm very confused. I'm designing one board with the protocol RS485 and I need polarize the lines of the MAX485.
**broken link removed**
Obviously, the value of the terminal resistence is 120ohm, but what is the value of the pull-up and the pull-down resistors to polarize the line?
The pull-up resistor is connected to the pin 6 or 7 ? The description of the pin 6 is "Noninverting Receiver Input and Noninverting Driver Output" and the description of the pin 7 is "Inverting Receiver Input and Inverting Driver Output".
Looking for in google I have found a lot of different circuits and a lot of different polarizations.
Thanks!!