Hardware manual

2 Installation EUROCOM-17-5xx
40 Hardware Manual
2.3 Jumpers and Switches
This section lists all features user-selectable by jumpers and switches. For
details, refer to the appropriate descriptions identified in parentheses.
All settings on a dark grey background ( ) indicate default settings.
The EUROCOM-17-5xx operates as single board computer in this
configuration.
There are only very few jumpers on the EUROCOM-17-5xx which
typically need no changes after shipping. All other parameters are
software programmable. Since the jumper connections are not changed
easily, it is strongly recommended that these changes are performed by
qualified personal only.
The user should refer to the silkscreen print on the component side of the
EUROCOM-17-5xx for the following guidance on jumper area pin
identification. Pin1 of every jumper area is marked by a beveled corner
on the silkscreen outline of the jumper. If you see this corner at the left
upper side of the jumper area, then pin2 is on the right-hand side of pin1.
Pin3 can be found on the right of pin2, and so on. Reaching the end of the
row, counting must be continued beginning on the left-hand side of the
next row.
2.3.1 Digclk
Invertion
(J1201)
J1201 allows to invert the Digclk signal.
2.3.2 Enable TTL
Video (J1202)
J1202 is used to enable the TTL video outputs at the VGA connector.
Table15: J1201 (Digclk Invertion)
Jumper J1201 Function
1 - 2 Digclk
2 - 3 Inverted Digclk
Table16: J1202 (Enable TTL Video Outputs)
Jumper J1202 Function
open TTL outputs disabled
closed TTL outputs enabled