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6 SBC-350A User's Manual
Jumpers and connectors
Connectors on the board link it to external devices such as hard disk
drives, a keyboard or PC/104 modules. In addition, the board has a
number of jumpers which you use to configure it for your application.
The table below lists the function of each of the board jumpers and
connectors. Later sections in this chapter give instructions on setting
jumpers and detailed information on each jumper setting. Chapter 3
gives instructions for connecting external devices to your card.
Jumpers and Connectors
Number Function Page
J1 Reset switch 19
J2,3,4,5 CPU clock and AT clock select 8
J6 Display type - mono, color 8
CN1 Power LED and Keylock 19
CN2 Hard disk driver activity LED 19
CN3 HDD connector 17
CN4 FDD connector 16
CN5 Parallel/printer connector 18
CN6 Keyboard connector 18
CN7/8 PC/104 expansion connector 43
CN9 SBC Power connector 20
CN10 COM1, RS-232 serial port 20
CN11 COM2, RS-232 serial port 20
CN12 Keyboard connector (6-pin mini DIN) 18
CN13 External speaker connector 21
SIMM memory modules
On the left end of the card (away from the mounting bracket) are the
four SIMM (Single In-line Memory Module) sockets which hold the
card’s DRAM memory. If you ordered DRAM SIMMs along with your
card, the SIMMs may already be installed. If not, you should install
them as described in Appendix B.