Motorola MVME166IG/D2 用户手册

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Hardware Preparation and Installation
2-4
MVME166 Single Board Computer Installation Guide
2
General Purpose Readable Jumpers on Header J3
Each MVME166 may be configured with readable jumpers.  These jumpers 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.
System Controller Header J6
The MVME166 can operate as VMEbus system controller.  The system 
controller function is enabled/disabled by jumpers on header J6.  When the 
MVME166 is functioning as system controller, the SCON LED is turned on.  
The VMEchip2 can be configured as a system controller as follows. 
15
GPIO0
GPIO1
GPIO2
GPIO6
GPIO3
GPIO4
GPIO5
1
2
16
GPIO7
All Zeros 
7
8
J3
IN
= Normal Debugger
OUT = BootBug
(Factory Configuration)
System Controller
J6
1
2
Not System Controller
(Factory Configuration)
J6
1
2