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Hardware Preparation and Installation
Optional Jumper Settings
3
General Purpose Software Readable Header J1
3-8
Most of the optional functions on your board can be changed
through software control or bit settings in control registers. If your
installation requires it, however, you may change jumper settings
on the following headers:
Jumper pins 9 through 16 on header J1 are general purpose
software readable jumpers open to your application.
Header J2 enables/disables the MVME167 as system
controller.
Headers J6 and J7 select serial port 4 to drive or receive
TRXC4 and RTXC4 clock signals.
Optional header J8 selects the SRAM backup power source
(this is only available as an optional factory build special
request).
Each MVME167 may be configured with readable jumpers. They
can be read as a register (at $FFF40088) in the VMEchip2 LCSR. The
bit values are read as a one when the jumper is off, and as a zero
when the jumper is on.
Reserved/DeÞned Bits
Jumpers on header J1 affect 167Bug operation as listed in
The factory (default) configuration is with all eight jumpers
installed (see
Table
3-3).
The MVME167Bug reserves/defines the four lower order bits
(GPI3 to GPI0).
Table 3-2
debugger:
describes the bits reserved/defined by the
Table
3-2.
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