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