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Appendix A – Mechanical Details
SocketModem Global MT5634SMI Developer’s Guide 78
Parallel Test/Demo Board Components
Figure A–4. Parallel Test/Demo Board
Interrupt (IRQ) Select Jumper – JP1
This JP1 Jumper is used to define the modem’s IRQ value by shorting a pair of pins together. The factory default
setting is IRQ 4 (pins 15 and 16)
I/O Address/COM Port/ IRQ Select Jumpers – JP2 and JP3
Jumpers JP2 and JP3 are used to define the modem’s I/O Address, COM Port, and IRQ selections. The factory
default setting is E, 3 (I/O Address. 3E8, COM Port 3, and IRQ 4).
Operating Voltage Select Jumper – JP4
The operating voltage factory default setting is 3.3V operation.