Digilent 410-310P - Manual

1300 Henley Court
Pullman, WA 99163
509.334.6306
www.digilentinc.com
PmodRS485
™ Reference Manual
Revised November 10, 2014
This manual applies to the PmodRS485 rev. B
DOC#: 502-310 Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 1 of 3
Overview
The Digilent PmodRS485 uses the ADM2582E from Analog Devices to provide signal and power isolation for high
speed communication lines utilizing RS-485 communication protocol. The PmodRS485 electronically isolates
devices up to +/- 15kV allowing for peace of mind while combining high voltage hardware with Digilent
microcontroller and FPGA system boards.
1 Functional Description
Basic usage of the PmodRS485 is to facilitate RS-485 and RS-422 serial communication protocols between devices
in environments with high electrical noise. The PmodRS485 can operate at half or full duplex modes with
differential paired signals while providing electrical isolation from other devices.
The PmodRS485 easily interfaces with Digilent Pmod headers and will operate at 3.3V and 5.0V, allowing for
connections to a wide variety of hardware. The controlling hardware can then communicate with devices using
standard serial communication protocols, such as UART.
The PmodRS485.
- Isolated RS-485 / RS-422 interfaces
- 16Mbps maximum data rate
- Connect up to 256 nodes on one bus
- Differential Half or full-duplex communication
- Operates with 5V or 3.3V input voltage and digital
signal levels
- +/- 15kV ESD protection
- Thermal shutdown protection
Features include: