Motorola MVME166IG/D2, MVME166D2 manual J3 Pins, Description

Installation and Startup

Bit	J3 Pins	Description
Bit #0 (GPI0)	1-2	When this bit is a one (high), it instructs the debugger
		to use local Static RAM for its work page (i.e.,
		variables, stack, vector tables, etc.).
Bit #1 (GPI1)	3-4	When this bit is a one (high), it instructs the debugger
		to use the default setup/operation parameters in ROM
		versus the user setup/operation parameters in
		NVRAM. This is the same as depressing the RESET
		and ABORT switches at the same time. This feature
		can be used in the event the user setup is corrupted or
		does not meet a sanity check. Refer to the ENV
		command (Appendix A) for the ROM defaults.
Bit #2 (GPI2)	5-6	Reserved for future use.
Bit #3 (GPI3)	7-8	When this bit is a one (jumper out) the BootBug will
		continue execution after reset or power up. Normal
		operation (jumper in) results in the BootBug executing
		the 166Bug debugger in Flash memory.
Bit #4 (GPI4)	9-10	Open to your application.
Bit #5 (GPI5)	11-12	Open to your application.
Bit #6 (GPI6)	13-14	Open to your application.
Bit #7 (GPI7)	15-16	Open to your application.

Note that when the MVME166 comes up in a cold reset, 166Bug runs in System Mode. Using the Environment (ENV) or MENU commands can make 166Bug run in Board mode. Refer to Appendix A.

2.Configure header J6 by installing/removing a jumper between pins 1 and 2. A jumper installed/removed enables/disables the system controller function of the MVME166.

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MVME166IG/D2 3-5