User guide

ECW-281B-D2550 Embedded System
Page 24
Figure 3-13: Secure the Half-size PCIe Mini Card
3.6 Jumper Settings
NOTE:
A jumper is a metal bridge used to close an
electrical circuit. It consists of two or three metal
pins and a small metal clip (often protected by a
plastic cover) that slides over the pins to connect
them. To CLOSE/SHORT a jumper means
connecting the pins of the jumper with the plastic
clip and to OPEN a jumper means removing the
plastic clip from a jumper.
The jumpers on the ECW-281B-D2550 motherboard are listed in 5Table 3-1.
Description Label Type
AT/ATX power selection JP2 2-pin header
Clear CMOS JP3 3-pin header
Table 3-1: Jumpers