Motorola MVME187 User Manual
3-8
Hardware Preparation and Installation
3
Optional Jumper Settings
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:
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.
software readable jumpers open to your application.
❏
Header J2 enables/disables the MVME187 as system
controller.
controller.
❏
Optional header J6 selects the SRAM backup power source
(this is only available as an optional factory build special
request).
(this is only available as an optional factory build special
request).
❏
Headers J7 and J8 select serial port 4 to drive or receive
TRXC4 and RTXC4 clock signals.
TRXC4 and RTXC4 clock signals.
General Purpose Software Readable Header J1
Each MVME187 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
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
.
The factory (default) configuration is with all eight jumpers
installed (see
installed (see
The MVME187BUG reserves/defines the four lower order bits
(GPI3 to GPI0).
(GPI3 to GPI0).
debugger: