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28 ST43401N/ND, ST43402ND User’s Manual, Rev. B
Enable/Disable Port A
Enable Port A
Disable Port A
Enable/Disable Port B
Enable Port B
Disable Port B
Enable Port A and Port B
Simultaneously
Use jumpers to connect the four
pins as illustrated.
= Jumper
connected
= Jumper not
connected
= Non-applicable jumper
(not relevant to the
option discussed)
J01
(A & B)
Enable/Disable Port A (EPA)
Ground (GND)
Enable/Disable Port B (EPB)
Ground (GND)
EPA
GND
EPB
Terminator Power J01A is for
Port A and J01B is for Port B.
Assign the terminal power
jumpers as shown below.
Internal terminator power source.
4
2
3
1
4
2
3
1
J03
Port A I/O
J01A
J01B
Port B I/O
GND
External terminator power source.
Internal terminator power to I/O.
Figure 12. ST43402ND I/O board J01 and J03 jumpers