Programming The Target's Eeprom; Controlling Target Execution; Bootload Mode; Startup - Motorola M68EVB912B32 User Manual

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3.1.3.3 Programming the Target's EEPROM

The target MCU's on-chip byte-erasable or Flash EEPROM may be programmed from user-

assembled S-Records on the host (terminal) computer by using the D-Bug12 commands BULK,

LOAD, FBULK, and FLOAD. For details, refer to 3.6 D-Bug12 Command Set.

All D-Bug12 commands that control the execution of user code may also be used in both EVB

mode and POD mode. Two additional commands are available in POD mode:

• RESET  resets the target MCU and places it in active background mode

• STOP  halts program execution on the target

For details, refer to the command descriptions in 3.6 D-Bug12 Command Set.

In this mode (W3-1 and W4-1), a user program may be loaded into the host EVB's byte-erasable

or Flash EEPROM. D-Bug12 may be replaced as the startup "boot" program. This mode may

also be used to reload or customize D-Bug12. The procedures are described in Appendix E 

EEPROM Bootloader.

The following startup procedure includes a checklist of configuration and setup items. To begin

operating the M68EVB912B32, follow these steps::

1. Configure the EVB if required — section 2.2.

2. Determine whether execution should begin in EVB mode (page 3-1), JUMP-

EEPROM mode (page 3-2), POD mode (page 3-2), or BOOTLOAD mode (page3-3).

Set the jumpers on headers W3 and W4 accordingly — sections 2.2 and 3.1.

3. Connect the EVB to the external power supply — section 2.3.

4. Connect the EVB to the terminal — section 2.4.

5. Configure the terminal communications interface — section 2.5.

68EVB912B32UM/D

OPERATION

3-3

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