Operating Procedures; Evb Mode; Jump-Eeprom Mode - Motorola M68EVB912B32 User Manual

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OPERATION

6. Apply power to the EVB and to the terminal. If the terminal is a host computer,

a. Verify that it has booted correctly.

b. Start the communications program for terminal emulation — section 2.5.3 and

Appendix B  Communications Program Examples.

7. Reset the EVB by pressing and releasing the on-board reset switch (S1).

3.2.2 Operating Procedures

After starting the EVB in accordance with section 3.2.1, follow the operating procedure for the

EVB mode that was selected: EVB mode, JUMP-EEPROM mode, POD mode, or BOOTLOAD

mode. These procedures are described in the following sections.

In EVB mode, the MC68HC912B32 begins executing code at the address contained in the

alternate reset vector at $F7FE (for information on the alternate reset and interrupt vector table,

see Vector Jump Table: Interrupt and Reset Addresses on page E-4). The code pointed to by

the alternate reset vector may either be D-Bug12 (factory default) or a user's program that has

replaced D-Bug12 in Flash EEPROM.

D-Bug12  upon reset, the D-Bug12 sign-on banner and prompt should appear on the terminal's

display as follows:

D-Bug12 v 2.0.0

For Commands type "Help"

If the prompt does not appear, check all connections and verify that startup steps 1

through 7 in section 3.2.1 have been performed correctly.

When the prompt appears, D-Bug12 is ready to accept commands from the terminal as

described in section 3.5.

User boot program  upon reset, the user program executes immediately. D-Bug12 commands

are not available. Terminal communications take place either via the SCI under control

of the user program or via the BDM interface and a serial debug interface tool such as

Motorola's SDI.

In JUMP-EEPROM mode, the user code in byte-erasable EEPROM starting at address $0D00 is

executed immediately. Terminal communications are controlled by the user code via the SCI or

by an appropriate serial debug tool via the BDM interface. For more information, refer to

3-4

68EVB912B32UM/D

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