EVB20020 Datasheet, PDF (5/5 Pages) SMSC Corporation – Industrial ARCNET AT Adapter Card

Jumpers
There are three sets of jumper blocks on the EVB-20020 board. JP1-4 selects the clock speed of the network
controller. JP1 and JP2 MUST BE INSTALLED for proper operation. JP3 and JP4 are for future use and should be
left unconnected. JP9, JP10, and JP11 select the source of data for the network controller’s receiver. JP12 – 17 are
used to choose the media type. Refer to the following table for the correct jumper settings:
MEDIA TYPE
Coax
Twisted Pair
Direct RS-485
Isolated RS-485
CONNECT JUMPERS
JP11
JP11, JP16, JP17
JP9, JP12, JP13
JP10, JP14, JP15
Interrupts
If your software is to be interrupt driven, the priority of the interrupt is selected through JP5-JP8 (IRQ3-6).
SMSC UG - EVB-20020
Page 5
Rev. 1/5/00