Figure 3-1. Control Signal Jumper Configuration
Table 3-4. THVD1424EVM Control Signal Function Table
Pin
Associated Jumper - Pin
Input Level
Function
RE
J2-3 and J2-8
Hi
Receiver Disabled
RE
J2-3 and J2-8
Low
Receiver Enabled
DE
J3-4 and J3-7
Hi
Driver Enabled
DE
J3-4 and J3-7
Low
Driver Disabled
TERM-TX
J8-3 and J8-4
Hi
Y-Z Termination Enabled
TERM-TX
J8-3 and J8-4
Low
Y-Z Termination Disabled
H/F
J8-7 and J8-8
Hi
Half Duplex Mode
H/F
J8-7 and J8-8
Low
Full Duplex Mode
TERM-RX
J8-11 and J8-12
Hi
A-B Termination Enabled
TERM-RX
J8-11 and J8-12
Low
A-B Termination Disabled
SLR
J8-15 and J8-16
Hi
500Kbps Mode
SLR
J8-15 and J8-16
Low
20Mbps Mode
Finally, the last group of signals are the differential bus pins A, B, Y, and Z. A and B are connected at terminal
J14 with Y and Z at terminal J17. In Half Duplex Mode Y and Z are both the TX and RX connections, in full
duplex mode A and B are receiver pins and Y and Z are transmission pins.
Board Description
THVD1424 Evaluation Module (EVM) User Guide
9
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