Intel ESM-2740 用户手册

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页码 93
ESM-2740/2743 
 
28 ESM-2740/2743 User’s Manual
 
 
2.3 Jumper and Connector List 
You can configure your board to match the needs of your application by setting jumpers. A 
jumper is the simplest kind of electric switch. 
It consists of two metal pins and a small metal clip (often protected by a plastic cover) that 
slides over the pins to connect them. To “close” a jumper you connect the pins with the clip. 
To “open” a jumper you remove the clip. Sometimes a jumper will have three pins, labeled 1, 
2, and 3. In this case, you would connect either two pins. 
 
The jumper settings are schematically depicted in this manual as follows: 
 
A pair of needle-nose pliers may be helpful when working with jumpers. 
Connectors on the board are linked to external devices such as hard disk drives, a 
keyboard, or floppy drives. In addition, the board has a number of jumpers that allow you to 
configure your system to suit your application. 
If you have any doubts about the best hardware configuration for your application, contact 
your local distributor or sales representative before you make any changes. 
 
The following tables list the function of each of the board's jumpers and connectors. 
Jumpers
 
 
 
Label 
Function 
Note 
SW1 
Reserved  
SW2 
FSB select 
SMD switch 
 
Connectors 
Label 
Function 
Note 
ETXA 
ETX connector X1 
HIROSE FX8-100P-SV   
ETXB 
ETX connector X2 
HIROSE FX8-100P-SV 
ETXC 
ETX connector X3 
HIROSE FX8-100P-SV 
ETXD 
ETX connector X4 
HIROSE FX8-100P-SV 
SODIMM 
200-pin SODIMM socket