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Configuring VME Option Boards
Table 2–18 Default Jumper Settings for VSC/3i Boards 0 Through 7 Variations
Jumper Pins
0
JP16
In
JP17
In
JP18
In
JP19
In
JP20
In
JP21
In
JP22
Out
JP23
In
JP24
Out
JP25
Out
JP26
In
JP27
In
JP28
In
JP29
Out
JP30
Out
JP31
Out
Notation
Indicates
In
Jumper installed.
Out
Jumper removed.
In
or
Out
Jumpers that you must install (In) or remove (Out) in the field;
all other jumpers are factory-configured, as indicated.
Changing the Synchronous Electrical Interface for VSC/3i
Channels
You can independently configure each full–duplex channel on a VSC/3i controller to
support RS–232–C, RS–449, RS–530, V.35, or X.21 synchronous devices. RS–530,
RS–449, and X.21 devices share the same electrical interface; the VSC/3i also
provides separate V.35 and RS–232–C communication.
As shown in Figure 2–9, each connector has three rows of 20 jumper pins associated
with it. You can change the electrical interface between each channel and the
Motorola 68302 Integrated Multiprotocol Processor by placing two 10–pin headers
(or jumper blocks) across the appropriate row of jumper pins.
2-28
(Any Operating System)
Board Number
1
2
3
4
Out
In
Out
In
In
Out
Out
In
In
In
In
Out
In
In
In
In
In
In
In
In
In
In
In
In
Out
Out
Out
Out
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
In
In
In
In
In
In
In
In
In
In
In
In
Out
Out
Out
Out
Out
Out
Out
Out
Out
Out
Out
Out
Function
5
6
7
Out
In
Out
Address bit A16
In
Out
Out
Address bit A17
Out
Out
Out
Address bit A18
In
In
In
Address bit A19
In
In
In
Address bit A20
In
In
In
Address bit A21
Out
Out
Out
Address bit A22
In
In
In
Address bit A23
Out
Out
Out
Address bit A24
Out
Out
Out
Address bit A25
In
In
In
Address bit A26
In
In
In
Address bit A27
In
In
In
Address bit A28
Out
Out
Out
Address bit A29
Out
Out
Out
Address bit A30
Out
Out
Out
Address bit A31
014–001867
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