UG-210 Evaluation Board User Guide
Rev. A | Page 4 of 12
Table 1. Board Configurations and Jumper Settings
Configuration Jumpers Fitted Jumpers Open
Full Duplex Configuration LK 15, LK16
Half-Duplex Configuration (A Connected to Y, B Connected to Z) LK15, LK16
No Biasing Resistors LK7, LK9, LK11, LK13
Bus Biasing Resistors on A/B only LK11, LK13 LK7, LK9
Bus Biasing Resistors on Y/Z only LK7, LK9 LK11, LK13
Bus Biasing Resistors on A/B and Y/Z (Full Duplex) LK7, LK9, LK11, LK13 LK 15, LK16
No Termination Resistors LK10, LK12
Termination Resistor on A/B only LK12 LK10
Termination Resistor on Y/Z only LK10 LK12
Termination Resistors on A/B and Y/Z (Full Duplex) LK10, LK12 LK 15, LK16
Powering the Bus Side Using the Regulator on the Board LK1 (Position B) LK1 (Position A)
Powering the Bus Side Using an External Power Supply LK1 (Position A) LK1 (Position B)
Using the Transformer on the Board LK2 (Position A) LK2 (Position C)
LK3 (Position A) LK3 (Position C)
Using the SMA Connector for RxD LK8 (Position A) LK8 (Position B)
Using the Screw Terminal for RxD LK8 (Position B) LK8 (Position A)
Using the SMA Connector for TxD LK5 (Position B) LK5 (Position A)
Using the Screw Terminal for TxD LK5 (Position A) LK5 (Position B)
RE High
LK4 (Position A)
RE Low
LK4 (Position B)
Using the Screw Terminal for RE
LK4 (Position C)
DE High LK6 (Position A)
DE Low LK6 (Position B)
Using the Screw Terminal for DE LK6 (Position C)
Tie RE and DE Together (Note Only One Jumper Can Be Inserted, Either
LK4 or LK6)
LK14 and (LK4 or LK6) LK4 or LK6
