Hi Team,
Good day!
One of my customers faced an issue using our SN75176 for their RS485 communications.
Here’s the summary of the issue that they were encountering with the SN75176:
Master:
- · Baudrate: 115200
- · RE Pin: Tied to GND
- · DE Pin: Tied to VDD
Slave:
- · Baudrate: 115200
- · RE Pin: Controlled by MCU
- · DE Pin: Controlled by MCU
Master |
Slave |
Remarks |
SN75176A |
SN75176A |
Master cannot receive correctly from the slave.
Slave can receive data from the master correctly. |
SN75176B |
SN75176B |
Doesn’t communicate correctly. |
Here is also the schamtic of their master and slave:
Master
Slave
Please help advise on what can cause this issue?
Thanks!
Regards,
Alfred