Motorola MVME2603-1121A, Installation And Use Manual

Page: 30 / 210

MVME2603/2604 Base Board Preparation
1-14
1
System Controller Selection (J22)
The MVME2603/2604 is factory-configured as a VMEbus system
controller by jumper header J22. If you select the ÔÔautomaticÕÕ
system controller function by placing a jumper on J22 pins 2 and 3,
the MVME2603/2604 determines whether it is the system controller
by its position on the bus. If the board is in the first slot from the left,
it configures itself as the system controller. If the MVME2603/2604
is not to be system controller under any circumstances, place the
jumper on J22 pins 1 and 2. When the board is functioning as system
controller, the
SCON
LED is turned on.
Remote Status and Control
The MVME2603/2604 front panel LEDs and switches are mounted
on a removable mezzanine board. Removing the LED mezzanine
makes the mezzanine connector (J1, a keyed double-row 14-pin
connector) available for service as a remote status and control
connector. In this application, J1 can be connected to a user-
supplied external cable to carry the Reset and Abort signals and the
LED lines to a control panel located apart from the
MVME2603/2604. Maximum cable length is 15 feet.
Table 4-1 lists the pin numbers and signal mnemonics for J1.
3
2
1
3
2
1
J22
Not System Controller
(factory configuration)
J22
Auto System Controller
J22
System Controller
3
2
1